make more obvious how to enable powerline font symbols
Merge pull request #40 from Nextil/solarized-theme

Added solarized theme.
Merge pull request #39 from Arkham/fix-doc

make more obvious how to enable powerline font symbols
fix simple theme for non-swapped gui
Added replace mode extension
Added paste and replace mode colourings to themes
Merge pull request #41 from brookst/mode-extensions

Mode extensions
fix regression with modified state being lost when switching windows.
shorten inactive windows to only the filename. resolves #35. also, treat inactive as a mode so it can be themed independently.
add netrw support. resolves #31.
refactor colors to use color map generator
support undotree, gundo, nerdtree, tagbar
use list of funcrecs, allowing window overrides to be dynamically added