added zenburn theme
fix solarized colors in tabline
add tab modification detection
init whitespace extension to blank. fixes #226.
Merge pull request #223 from paulbdavis/master

Added zenburn theme
remove repeated comments. add zenburn to auto theme switch.
Merge pull request #224 from seletskiy/tabline-detect-modified

add tab modification detection
Merge pull request #225 from seletskiy/solarized-tabline

fix solarized colors in tabline
Allow flag configuration of tagbar statusline string
Merge pull request #228 from vhda/master

Allow flag configuration of tagbar statusline string
correct docs for the default value.
creating tabline theme

WORK IN PROGRESS !!
limit the number of buffers displayed. fixes #221.
just in case...defense coding.
Merge remote-tracking branch 'upstream/master'

Merging bling's upstream into my fork
basic working independent inactive modified highlights.
use airline_c for better predicability.
check existence of inactive modified colors before using them.
fill in inactive modified colors.
show hidden buffers with a different color. resolves #229.