v0.3.0

Breaking changes

• New VTEnc API. #31

Bug fixes

• Fix nodes visiting order. #25

Other

• Improve decoding performance by memoizing higher bits. #29
• Coding style. #30
• Do not use typedef for internal structs. #27
• Re-implement BitClusterStack to use a fixed-size array instead of allocating memory. #26
• Replace BitClusterStack with generic implementation. #28
• Removes -g3 gcc flag for all targets, except debug. #32