Update HarvestTool.java

Some light testing suggests it isn't 100% broken.
Mine blocks with weird materials if Forge says it's alright
patched divide by zero within SmelteryGui
Merge pull request #194 from GraxRabble/master

patched divide by zero within SmelteryGui
Merge pull request #192 from purpleposeidon/patch-1

Update HarvestTool.java
Merge branch 'master' of github.com:mDiyo/TinkersConstruct