zsh: moved bindings from zshrc to zsh/bindings
regarding prev. commit: forgot to commit zshrc changes
zsh: shortened global aliases
zshrc: added RM_STAR_WAIT & changed sourcing order
zsh: added M-s bind to insert sudo at line start
zsh/completion: various changes

- 'zmodload -i' is deprecated, remove it
- Added more programs to be affected by 'ignore-line'
- Don't complete current dir
- Removed smart case & substring completion in favor of just case
  insensitive completion; I occasionally hit tab for substring
  completion and instinctively hit enter, only to operate on the wrong item
- Removed sudo completion bit; was only required on Gentoo, and the
  zprofile bit isn't there anymore
actually remove sudo bit