support base16 variant of solarized. resolves #148.
update branch head all the time (#42).
fix error on startup in certain configurations (#150).
detect branch when changing directories. resolves #138.
improve undotree integration; use exposed statusline functions.
fix airline theme not getting loaded on startup (#151).
add gitgutter integration.
temp disable, some errors weird cases
improve gitgutter integration and algorithm
disable hunks by default, a couple bugs remaining.
default whitespace symbol to non-unicode unless powerline fonts are enabled (#155).
re-enable gitgutter integration with new upstream function. resolves #154 and #153.
fix autoselection of theme for certain startup configs.
allow specific whitespace checks to be enabled/disabled.
undo use of inverse; caused problems with empty sections.
Add option to show only non-zero hunks
Prior checking user defined theme
fix color switching again. vimrc setting should override.
support x,y,z theming. resolves #159.
Merge branch 'use_defined_theme'

Conflicts:
	plugin/airline.vim