Added more book commands for editing author and title
Added more book arguments for editing author and title amend
Merge branch 'patch-2' of https://github.com/GunfighterJ/Essentials into patch-2

Conflicts:
	Essentials/src/com/earth2me/essentials/commands/Commandbook.java
Merge pull request #259 from GunfighterJ/patch-2

Added more book commands for editing author and title