* Added Prowl ability.
Added 4 cards with Prowl ability.
[minor] small cleanup to Life's Finale.
Modify TriggeredManaAbility for choices
Added Fertile Ground and Early Harvest
AbilityImpl code cleanup.
- Added Deathbringer Thoctar, Thought Hemorrhage, Vectis Dominator.  Fixed Erratic Portal.
Added SpliceOntoArcane Ability. It's working but it will need some handling improvements.
* Thieving Sprite - Fixed game log text bug (no blanks).
[MMA] Added 3 cards.
- Added Shield of the Righteous
Merge branch 'master' of https://github.com/magefree/mage.git
Some improvements for Splice onto Arcane Ability (game log text, reveal all spliced cards  at once).
Added checking if file for deck importer exists.
Some rule text generation improvement for ExileFromGraveCost.
[MMA] Added 3 cards.
* Kicker added support for Kicker X.
[MMA] Added Verdeloth the Ancient.
- Added Double Negative and Knight of New Alara.
- Added Godtracker of Jund, Leonin Armorguard, and Reborn Hope.