Remove M-O keybinding

It interfered with the Terminal's handling of arrow keys.

This fixes #343.
Map Option to Super and Fn to Hyper

More keybinding options is never a bad thing.
Add prefix arg to prelude-smart-open-line

With a prefix arg the command will invoke prelude-smart-open-line-above
Replace electric-indent-mode and paredit with smartparens
Ops :-)
Remove yasnippets from the list of default packages

Prelude provided just a basic config anyways. Anyone can still install
the package manually and enable it in his/her personal config.
Don't create the snippets dir
Merge branch 'master' of git://github.com/bbatsov/prelude
Add and then disable wrap-region; soon to be relpaced by smartparens.