Fix card damage fixing - Fixes bugreport:7935
Fix GVG and Card reductions for skills that use separate damage calc functions
Removed some unnecessary code causing attack underflow in homunculus - Fixes bugreport:7925
Update Feint Bomb damage formula to 2011 rebalance - Concering bugreport:7912
Update Siren's Voice to 2011 rebalance formulas - Fixes bugreport:7878

git-svn-id: https://rathena.svn.sourceforge.net/svnroot/rathena/trunk@17441 54d463be-8e91-2dee-dedb-b68131a5f0ec
Some Skill Updates
Updated Axe Boomerange and Power Swing skill ratio formulas - Fixes bugreport:7937
- Updated Power Swing Stun rate
Updated Triangle Shot skill ratio formula - Fixes bugreport:7936
Updated Overbrand skill ratio formulas - Fixes bugreport:7938
Fixed Hundred Spear activating Spear Boomerang twice - Fixes bugreport:7899
Thanks to reineil for all the reports.

Re-added Magic Crasher fix for attack formula - Fixes bugreport:7869

Follow up to 5e3bb8a - Revert changes to attacker card fixing

git-svn-id: https://rathena.svn.sourceforge.net/svnroot/rathena/trunk@17442 54d463be-8e91-2dee-dedb-b68131a5f0ec