Merge pull request #5 from Toops/master

update from upstream
Update DeepTankLogic.java

refactoring of method checkValidStructure as a solution for issue Toops#21
Update DeepTankLogic.java

little adjustment + renaming a variable
Update HighOvenLogic.java

refactoring method checkValidStructure to solve Toops#22
Create fr_BE.lang

initial version: WIP
Rename fr_BE.lang to fr_FR.lang
Merge pull request #24 from wisthy/master

fix for checkStructure (toops#21 & toops#22)