Git: ignore doc/tags

This is for people installing Command-T as a Git submodule under
~/.vim/bundle with pathogen.vim. We don't want a generated file
cluttering up their 'git status' listings.

Signed-off-by: Wincent Colaiuta <win@wincent.com>

doc/.gitignore

@@ -0,0 +1 @@
+tags