Commented and reordered Spells.lua.
Use DRData and LibSpellbook to handle crowd-control spells.
Properly use "ally" or "enemy" instead of the "default" unit.
Refactored the DSL - removed a lot of copy-pasta.
Minor fixes in definitions.
Added most druid spells.
Use repeating scans for mouseover.
Updated the README file (and use Textilre markup instead of Markdown).