Merge pull request #413 from crazymaster/master

Update README.md
add switch action
Merge pull request #414 from joelmo/switch_action

add switch action
- Improved uniq in mru source.
- Added g:unite_source_history_yank_save_clipboard(experimental).
- Added FocusGained event in history/yank source.
- Fixed #415 history/yank source.
- Fixed documentation.
- Updated FAQ.
- Improved documentation.
- Fixed #417 g:unite_source_rec_max_cache_files problem.
- Changed narrow behavior.
Fix for new vimshell API
Improve a comment.
Merge pull request #421 from todashuta/master

Improved a comment.
Fix #422 file exists
Fix #422 mru check
Improve cursor line
Fix logic of loading migemo path
Merge pull request #424 from haya14busa/fix/matcher_migemo

Fix logic of loading migemo path