Add cleanup function to install script

Still just tells them to clear it out - it will go when it stops being
useful to retain.
Removed a lot of the zsh bin folder content

They have stopped being executable after the ansible install. While that
needs to be fixed, the fact that so many are no longer useful means this
is a good chance to get rid of them.
Memcache cli scripts are kinda cool

They have been made into a separate repo. They work perfectly.
Remove notify-log command

Not really that useful
Change to hastebin.com for quick shares
mgk has become an alias

Was overkill to have it as a script
Turn permission-tree into an alias
pretty-print is a duplicate of columns -t

columns is a lovely command
Delete restart-wireless

This may well be incorrect by the time I actually use it again.
Turn strip-color into an alias
Turn youtube into an alias

This is probably the limit as two of the others are intended for cron
jobs, and the other two have functions within.
Make scripts executable

Haven't found a way to copy the files preserving permissions, but this
should be the next best thing. At this point all of the files in the bin
folder need to be executable.