Fixed vim config, autojump and ctags installed

=> Removed Matchit plugin
=> Now you YouCompleteMe is installed
=> Autojump is now installed
=> Added exuberant-ctags to the list of packages to be installed
Changed ctags path in .vimrc

=> It used to be on /usr/local/bin/ now the default path is used
(/usr/bin)
Tmux configuration is now properly bootstrapped