Adds the db relation changed and departed hooks for mysql. (Rebase from jaycee PR)

Conflicts:
	hooks/config-changed
	hooks/start
fixed utils placement from merge
Fixed utils placement from merge
Add more detail on using ghost.
Merge pull request #13 from castrojo/patch-1

Add more detail on using ghost.
Make unexecutable hooks executable, so juju stops warning.
Merge pull request #15 from jaycee/executable-hooks-only

Make unexecutable hooks executable, so juju stops warning.
Moved the icon into the root path
Added a copyright file
removed config options which were marked TODO
Added the Ghost 0.4.1 release archive to the assets and deploy from there
Added balancer relation on the http interface so that the apache2 charm can do load balancing across ghosts units