Add AckWindow/LAckWindow to search buffers displayed on current tab page.
Improved handling of filenames for :AckWindow
Fix duplicated results for files displayed twice
Fix go mapping
Add optional (fallback) grepformat to g:ackformat

`grepformat` can hold multiple values separated by commas. When parsing results Vim tries to match lines against each of formats specified.

I added additional format `%f:%l:%m` that doesn't include column. This allows using `git-grep` (that don't have an option to output column number) with this plugin just by setting `g:ackprg` like this:

    let g:ackprg = 'git grep -H --line-number --no-color'
Fix q mapping for location list commands

Variations of :LAck had 'q' mapped to :cclose, which would never trigger
the location list to close.
Add auto-preview feature

Auto-preview files when they are selected in the quickfix window.
Include `let g:ackpreview=1` in your .vimrc to enable.
Issue fix #84

Fix to highlight works with quotes and doubles quotes
Update wording in the helptag
Added 'O' Shortcut

Added 'O' (Upper case 'o') shortcut to open the file and close
the quickfix window.
Escape `#` and `%` passed to &grepprg

Fixes #67
fix ackhighlight
fixes issue #81 and closes #99

thank's for @MultiCoreNop, who open a PR with the fix
Merge branch 'mMontu-master'