Notes on CFG

[jecisc]

• #isStart: should be managed in the builder
• NullBlock should not always be added
• #isFinal should be renamed #couldBeFinal
• Integrate visualization in inspector tabs
• Add visu in non starting nodes and highlight the concerned node
• FASTGenericCFGBuilder>>#addPendingNextBlockAction: is bad
• Move FASTConditionalBasicBlock>>#nextTrueBlock, FASTConditionalBasicBlock>>#nextFalseBlock to FAST
• We should have only one final block