Per project .vimrc files

Adding this to your .vimrc:

" Per-directory .vimrc files
set exrc
set secure

Now vim will also load a ./.vimrc after $MYVIMRC (~/.vimrc, generally) has loaded. We use this for a few things:

• Setting project wide agreed configurations, like indentation.
• Adding Rails.vim macros that are specific to this project.
• Adding snippets and expansions that are specific to this project.

For example, this is the ./.vimrc file of one project I'm working on: https://gist.github.com/3316523