Change README

Have to change the readme content, too many changes going on. Will do
that later.
Delete handpicked snippets

Changed to the default version from Honza, which is much better!
Remove install script

Installation of my vimfiles will be down by Puppet. No need for shell
script.
Add spell file

This will be a personal database of frequently used words that the
spellchecker should ignore (i.e. see as correct)
Add plugins & spellchecker

Multiple plugins were added.
Add spellchecker functionality
CTRL-W z will close quickfix location list buffers
Fix folding level for 5. and 23.
Set spellchecker for Markdown & gitcommit
Set autowrite for file focus loss
Set Gist snippets to private by default