Add bubblegum theme
Merge pull request #114 from p-m-p/master

Add bubblegum theme
add modified colors to jellybeans
first pass at tomorrow themes (#67, #113)
extract colors from normal if undefined (#67, #113).
tweak tomorrow colors, covers all dark themes pretty well. resolves #67 and #113.
pick highlight groups that are also compatible with the light variant
use directory group instead of spell to support gui colors
update readme, link to popular colorschemes
Merge branch 'mapping-count'
Make themes#generate_color_map robust against undefined highlights
Merge pull request #116 from LeszekSwirski/empty-color-fix

Make themes#generate_color_map robust against undefined highlights
invoke funcrefs a different way, resolves #115.
fix regression, allow statusline funcrefs to execute
extract bufferline into its own file
make bufferline almost entirely self contained
extract syntastic
extract fugitive/lawrencium
extract tagbar
do not overwrite when left only