add omnisharp, syntastic and YouCompleteMe

removed supertab
updated elixir snippets
updated neobundle
fix syntax bundles lazing loading issues

since the last update of neovim the lazy loaded syntaxes does not work anymore
enable auto write
remove current line and column highlighting
update the match it plugin location

it seems to have moved
add the vim-projectionist plugin
define shortcuts for inserting backslash, tilde, brackets and square brackets