Fix broken bundles caused by changed GitHub URLs
Switch colour scheme to solarized dark
Disable left scrollbar in GUI, as well as right
Add silverlight searcher (ag) plugin
Fix indentation slightly
Replace vim-powerline with lightline.

Vim-powerline is deprecated and replaced with powerline, but that has
nasty native dependencies and isn't hugely fast.  Lightline does
everything I need and is pure VimL.
Add neocomplcache
Disable session auto loading
Add signingkey