v0.2.0

Initial PyPi release.

New features and improvements:

• Support for parsing LF_BITFIELD (#3)
• Fixed parsing DBI when PDB has more than 65K references to source files (#7)
• Merged lots of improvements contributed to drakpdb fork in Drakvuf Sandbox repository by @BonusPlay, @catsuryuu, @chivay, @icedevml.