Update HighOvenDuctLogic.java

replace comparison between the int "mode" variable and hardcodded int values to use constants instead
Update HighOvenDuctLogic.java

added a "todo" waypoint where some investigation has to be done. The method "masterInventory.onInventoryChanged();" is called when outputStack is empty. It make more sense to call it when outputStack is NOT empty.
Update HighOvenDuctLogic.java

adding some comments/javadoc
Update HighOvenDuctLogic.java

remove comments about enum until I have a better understandment of the mod
Update HighOvenDuctLogic.java

found something strange on the method that push item into the HighOven. It is suppose to push ingots (or meltable items) into slot 4 or higher but the HighOven is defined with slots between 0 and 3. So there are never any slot 4 or higher available to push iron into.
Update HighOvenDuctLogic.java

adding more comments/javadoc
Update HighOvenDuctLogic.java

Last batch of javadoc/comments for this class.
Merge pull request #10 from wisthy/master

Some javadoc/comments/refactoring~
I like this direction. I've been meaning to add some real documentation anyway. Hopefully I can remember all the little changes I've made recently before this...