0.3.0 release with some bc
- COMM, APIC, USLT, WXXX tags returns as a map
- WXXX frame returns WURL object
- various fixes
- added USLT tag
- added possibility to pass many COMM, APIC, USLT tags
- APIC processing was refactored
- hex encoder
- unrecognized encoding falls to hex encoder (removed unsupported encoding error)
- unsupported tags like PRIV will be printed just like raw binary data