Merge pull request #7 from DrkSephy/master

Working on Player Stat Screen
Moved button plugin from plugins to plugins/button subdirectory. Cleaned/Reformatted button plugin code. Minor typo fix in ig.global.alignToGrid() function description.
Adding female mage animation sheet
Adding Female Sage Animation Sheet
Adding Valkyrie animation sheet
Added check for terrain movement cost before player unit moves onto tile (disallow player unit movement onto tile if unit does not have enough movement points).
Adding Wyvern Knight Animation Sheet
Merge remote-tracking branch 'upstream/master'
Adding Dark Druid Animation Sheet
Adding Archsage Animation Sheet
Adding Queen Animation Sheet
Adding Pegasus Knight Animation Sheet
Adding Wyvern Lord Animation Sheet