Merge pull request #24 from wspeirs/master

Updated nom dep

v0.7

Merge branch 'master' of github.com:adamgreig/sdr-rs

Add high/low/bandpass filter generation functions

Merge pull request #22 from FauxFaux/clippy-1

clippy: mostly docs, &Vec and { foo: foo }

make downconverter also a process() fn on a struct

Fix typo in comment

Add AGC, closes #13

Improvements to FM demodulator

Remove print statements from FIR filter...

fix FM demod tests

Allow FIR blocks that are not a multiple of the decimation rate

Have FM demodulator maintain differentiator state across calls