Articles:
http://habrahabr.ru/post/201564/
  https://github.com/joedicastro/dotfiles/blob/master/vim/vimrc

:h
    unite-key-mappings
    unite-options
    unite-sources

Keys:

Tab
C-i
    Different Unite action (see |unite-action| to read on about different actions).

TODO:
Modes:
    fuzzy

Sources:
:h unites-sources
    file
    file_rec
    buffer
    yank

:h unite-kinds
    ???
:h unide-default-actions
    ???

Options:
  unite-options

-default-action=
-start-insert
-no-start-insert
  g:unite_enable_start_insert
-verbose
-log  - enable log mode (tail -f like)


Candidate list masks:

*hisa
    This example matches hisa, ujihisa, or ujihisahisa.

**/foo
    This example would matche bar/foo or buzz/bar/foo.
    Two consecutive wild cards recursively match directories.

Note: The unite action |file_rec| (read: file recursive) does a recursive
file search by default without the need to set wildcards.

foo bar
foo|bar
    This example matches "foobar" and "foobazbar", but not "foobaz"
    Multiple keywords can be be use to narrow down the candidates. They are separated by either a space " " or a pipe "|", and act like a logical AND.

foo !bar
    This example matches candidates that contain "foo" but not "bar".
    Specify negative conditions with a bang "!".

" Jump to line 3.
foo :3
" Search to "bar".
foo :/bar
" Executes :diffthis command.
foo :diffthis
    Specify command execution after the action with a ":".
    See |unite_default_key_mappings| for other actions.

:h
    unite-key-mappings

Normal mode mappings.
{lhs}		{rhs}
--------	-----------------------------

i		|<Plug>(unite_insert_enter)|
I		|<Plug>(unite_insert_head)|
a		In case when you selected a candidate,
		|<Plug>(unite_choose_action)|
		else |<Plug>(unite_append_enter)|
A		|<Plug>(unite_append_end)|
q		|<Plug>(unite_exit)|
Q		|<Plug>(unite_all_exit)|
g<C-g>		|<Plug>(unite_exit)|



<C-h>		|<Plug>(unite_delete_backward_path)|

<C-n>		|<Plug>(unite_rotate_next_source)|
<C-p>		|<Plug>(unite_rotate_previous_source)|

<C-a>		|<Plug>(unite_print_message_log)|
<C-k>		|<Plug>(unite_print_candidate)|


<C-r>		|<Plug>(unite_restart)|

gg		|<Plug>(unite_cursor_top)|
G		|<Plug>(unite_cursor_bottom)|
j		|<Plug>(unite_loop_cursor_down)|
<Down>		|<Plug>(unite_loop_cursor_down)|
k		|<Plug>(unite_loop_cursor_up)|
<Up>		|<Plug>(unite_loop_cursor_up)|
J		|<Plug>(unite_skip_cursor_down)|
K		|<Plug>(unite_skip_cursor_up)|

M		|<Plug>(unite_disable_max_candidates)|
N		|<Plug>(unite_new_candidate)|

<CR>		In case when you selected a candidate, runs default action
b		In case when you selected a candidate, runs bookmark action
d		In case when you selected a candidate, runs delete action
e		In case when you selected a candidate, runs narrow action
t		In case when you selected a candidate, runs tabopen action
yy		In case when you selected a candidate, runs yank action
o		In case when you selected a candidate, runs open action
p		runs preview action
x		In case when you selected a candidate, runs
		|<Plug>(unite_quick_match_default_action)|

<Plug>(unite_input_directory)
		Narrows with inputting directory name.
<Plug>(unite_narrowing_path)
		Narrowing candidates by candidate path (or word).

.		<Plug>(unite_narrowing_dot)


Insert mode mappings.
{lhs}		{rhs}
--------	-----------------------------
<ESC>		|i_<Plug>(unite_insert_leave)|
<C-n>		|i_<Plug>(unite_select_next_line)|
<Down>		|i_<Plug>(unite_select_next_line)|
<C-p>		|i_<Plug>(unite_select_previous_line)|
<Up>		|i_<Plug>(unite_select_previous_line)|
<C-f>		|i_<Plug>(unite_select_next_page)|
<C-b>		|i_<Plug>(unite_select_previous_page)|
<CR>		|i_<Plug>(unite_do_default_action)|
<C-h>		|i_<Plug>(unite_delete_backward_char)|
<BS>		|i_<Plug>(unite_delete_backward_char)|
<C-u>		|i_<Plug>(unite_delete_backward_line)|
<C-w>		|i_<Plug>(unite_delete_backward_word)|
<C-a>		|i_<Plug>(unite_move_head)|
<Home>		|i_<Plug>(unite_move_head)|

<C-d>		runs delete action
<C-e>		runs edit action
<C-t>		runs tabopen action
<C-y>		runs yank action
<C-o>		runs open action


Both (Insert and Normal) mode mappings.
{lhs}		{rhs}
--------	-----------------------------
<Tab>		|<Plug>(unite_choose_action)|
<C-g>		|<Plug>(unite_exit)|
<C-l>		|<Plug>(unite_redraw)|
        !!! clears unite cache also !!!

??? Narrow action (n)


souurces (unite-sources)

file
file_rec
file_rec/async
directory
buffer
tab
register
bookmark
source - source names themselves
window
output - executed vim cmd as 
command - ... vim ex cmd
function
mapping - vim mapping
grep,vimgrep,find
line
jump - res of :ju[mps] list
change - res of :changes
jump_point,file_point - ???
launcher - executable files from $PATH
history/yank
menu
process
script - generated by scripts (not vim, but perl and so on)

??? unite-kinds
??? unite-filters


options:

    g:unite_source_file_rec_max_cache_files

unite-actions:

Default actions

kind		action
{kind}		{action}
----------	----------
file		open
buffer		open
tab		open
directory	narrow
word		insert
jump_list	open
source		start

??
g:unite_update_time
...

unite-source-attributes

max_candidates (0 - max is infinity)
is_volatile (0 - candidates are cached)
matchers
sorters
converters


unite-kind-attributes

:h unite-faq

A: It is a feature.  cf: |g:unite_source_rec_max_cache_files|.
And the default max candidates are limited. You can customize it by
|unite#custom#source()|. >
	let g:unite_source_rec_max_cache_files = 0
	call unite#custom#source('file_rec,file_rec/async',
	\ 'max_candidates', 0)

Note: |unite-options-sync| may be useful. It blocks Vim until the cache is
completed.

:h vimproc-functions