Big Changes to Vim - Colorscheme, Powerline

+ Removed vim-powerline in favor of a more custom, simple statusline
    + new statusline still switches color based on mode
    + still displays about the same information
+ added vim-colorschemes plugin
    + adds many different colorschemes for easy switching
    + switched to jellybeans theme
+ Made it easier to reload vimrc for quick changes
    + changed all function to function! calls (overrides on each save)
    + added check for whether the vimrc has been loaded before to only do things once
        + only loading Vundle plugins once
+ added autocmd to source vimrc.local files on save