Added C++ Mappings and shortcuts and fixed python mapping.

C++ mappings compile and run program without arguments using clang++
Commented out html echo thing which was annoying.
Added VirtualEnv Variables and setup.
Added keybinds and clang autocompletion for C++

Used a vimball to install clang autocompletion. Added C++ key mappings
and shortcuts for running programs and fixed python mapping.
C++ mappings compile and run program without arguments using clang++
Commented out html echo thing which was annoying.
Merge branch 'Rebase'
Switched pdflatex to xelatex for speed & unicode support