v0.21

• Add support for decoding LTCC and LTECC in TMC (#80)
• Add support for decoding RDS output from the TEF6686 tuner (#89)
• Add support for Alternative Frequencies Method B (#88)
• Breaking: Change the name of the field alt_kilohertz to either alt_frequencies_a or alt_frequencies_b. The type of data sent by these methods differs. When --show-partial is set, the AF list will be in partial_alt_frequencies regardless of method.
• Add option --input / -i to specify the stdin input format (bits, hex, mpx, tef). The old options will still work.
• Fix automake script on Windows (#81)
• Fix compatibility with current liquid-dsp (#78)
• Fix output for UTF-8 encoded TMC location tables (#82)
• Fix clock_time displaying wrong date around midnight (#83)
• Fix misinterpretation of the Decoder Identification bits (#87)
• Fix decoding of RadioText for stations that don't use string terminators (#77)
• Fix an off-by-one bug in the RadioText decoder that sometimes caused missing characters at the end of messages
• Fix runaway PLL after digital silence by clamping the phase error (#94)