Use audible bell in MinTTY

I'd like to be able to use MinTTY as the terminal while using Irssi as
an IRC client.  Getting notifications when using IRC is useful, so
making them as noticeable as possible is useful.
Comments should end with fullstops
Bell in Irssi when receiving a message

I want to be able to use Irssi without constantly monitoring for
messages, so let it send a terminal bell whenever something happens.
Add current line number to line numbering
(cherry picked from commit 6914acaf3e43bba5761da01cc660fe44ab674ddc)
Add some work Vim syntax files
Rainbow brackets in Vim!

Different colours to highlight different brackets is an awesome feature!
Let's have some of that!
Check spelling on Subversion commit messages
Merge remote-tracking branch 'origin/master' into git