Unbind the 'Escape key' from 'copy-mode'

It was becoming a bit too troublesome as I bound '<c-a> p' to paste and
i kinda preferred it as my 'Previous Window' key.

Have to remap some!
Added my first set of 'autocommands'.

Heavily inspired by 'athaeryn'; still to add more once i can understand
them.
;)