Add DefineButtonTag Reader and Writer
Add writeFixed16_16 method
Update ButtonCondAction and DefineButton2Tag, add BlendModeRecord
Add BlendMode implementation
Add readDefineButtonTag and readButtonRecord2
Add readButtonCondAction method
Add TODO comment
Add writeDefineButtonTag and sub methods
Merge pull request #44 from alucas/push_definebutton2

Add DefineButtonTag and DefineButton2Tag.
Add readDefineButtonTag v3
Add writeDefineButtonTag v3
Add read and writeButtonRecord2 v8
Fill context.tagStask
Test first and last tag
Prohibition of the use of the field Actions with AS3
Merge pull request #45 from alucas/push_definebutton2

Fix some stuff with DefineButton2 tag
Updating to Flex 4.10. Making code conform to existing conventions. Removing for..each because the loop order is undefined. Making ButtonRecord2 independent from ButtonRecord. Removing IRecord. Ignoring if first tag is not FileAttributes. Using next bytePosition in getBytePosition if bitPosition > 0. Moving FilterRecord to SWF 8.