sublime_text: Upgrade some packages

Also fix renamed ERB package which caused problems when starting sublime
text 3.
vim: Set nicer colors for invisible characters
vim: Add trailing whitespace highlight (commented)

This doesn't work as needed yet, so just put it here as a comment.
vim: Add <Leader>s for saving a file
vim: Only highlight line number of current line

This is a test if not highlighting the full line is less obstrusive but
still recognizable.
tmux: Allow reloading of tmux conf
tmux: Add development layout shortcut
launchbar: Try commiting - will it stay that way?