Switch from vim-powerline to the newer "powerline"

Powerline is now a much broader project with support for ipython, tmux
etc.
add support for .editorconfig standard.
add LiveScript support.
moved several cli vim settings to !has(gui_running)
smarter search.
add TernJS for cool JS autocompletion.
better markdown hl, vim-surround...

and better colors for presentations (sublime-text inspired)
add htmldjango to MatchTagAlways highlight.
set molokai more sublime-like.
*.nfo file support
switch from NERDcommenter to tComment

for now I like it better. Especially because it can recognize CSS/JS in
HTML templates and use the correct comment-signs!