Delete from bashrc; RVM data, outdated nvm and jsctags

Since Mavericks ships Ruby 2.0, and all the dev VM are using Vagrant,
there is no need to keep RVM, nvm. The jsctags (github mozilla/doctorjs)
looks like is abandonware, so also makes sense to remove that line.
Change sed for cut in processing the Weather XML response

Also there was a little mistake in the comparison
Add the bindings for Vim and Tmux to nav the panes

Using vim-tmux-navigation and these keybindings, I could achieve
seamless movement between tmux and Vim panes