Add vim-signify; remove vim-gitgutter

References #488.
Need to disable indent guides auto colors. If not explicitly disabled the defined colors are always overridden.
add fullscreen mode for GVIM and Terminal
add bufferline, work well with airline
change airline theme, match with solarized theme
Merge pull request #498 from JoveYu/3.0

some useful configuration
Merge pull request #489 from mhinz/add-signify

Add vim-signify; remove vim-gitgutter
removed unused 'link'
adding vim-over
Adding vim-sneak
Source before config after environment and essentials are set up
Source bundles.{fork,local} at the *end* of .bundles

Conflicts:
	.vimrc.bundles
Move UnBundle to .vimrc.bundles with a note
A visual representation of how the various config files are imported
Add note about has('x') testing
Source fork before local
Source fork and local last
Add rendered dependency graph
Add note to fixup FullScreen map
Add a note about the purpose of vimrc.before