Fixed some inconsistencies in how damage/speed of tools is calculated in GUIs
 * Fixed damage not being calculated properly in Crafting Stations
 * Fixed Crafting Stations stonebound speed calculations (they were using a different algorithm)
 * Fixed typo that made GUIs show the primary mining speed of dual harvest twice
 * Fixed Stonebound damage bonus/loss always being truncated to an int in GUIs
Merge pull request #551 from squeek502/1.6.4

Fixed some inconsistencies in GUI code