[plugin] Added unite basic config

Change-Id: I3c06077fdb661c09a2d44b5c34a090ddb21eadea
[autocmd] Added Unite augroup

Change-Id: I30489447f4cd586bb8d1824178ee94c340fe43e7
[config] Reenabled  the "autochdir" option

This option was reenabled because of the Unite plugin, but conflicts with
Vimshell. A solution must be found

Change-Id: I1ce6ff6ccc8b9357429484f92dd5e094b39930c3
[autocmd] Added unite augroup

Change-Id: I9bd8408b62d643d7561e1d2a9640c20220077776
[plugin] Added unite plugin and its basic configuration

Change-Id: I3184da1540a7fb242b2e03c1f6a8eaf933bc010a
Merge branch 'unite' into next

* unite:
  [autocmd] Added unite augroup
  [autocmd] Added Unite augroup
  [config]  Reenabled  the "autochdir" option
  [plugin]  Added unite plugin and its basic configuration
  [plugin]  Added unite basic config

Conflicts:
	.vim/plugins.vim

Change-Id: I033ed57f5c75816567b934f53799e6313f642d62
[doc] Updated README.md

Updated rnpvim documentation:

- ctrlp.vim
+ rainbow parentheses
+ unite

Change-Id: Ia2d1cf8afd94bac4f1642e39405ea23ee856ec93