ThreadLocalVar: change set/getDefaultValue() to set/getInitialValue() which makes it more clear that it concerns initialization.
ThreadLocalVar: removed method getTypeAsDesc()
AbstractLocalVar: added method getDescriptor() to replace the one removed from ThreadLocalVar. 
DiSL, AbstractParser: updated to reflect the changes in ThreadLocalVar. 
TLVInserter: cleaned up and simplified to use code already present in AsmHelper instead of duplicating it.