No longer creating fft objects on the fly - improves performance. Using more data for benchmarks.
Using fast vector magnitude function to improve performance.
Precreating fft object to improve performance
Bugfix for preamble detection - threshold wasn't being set correctly on reset()
Merge branch 'master' of https://github.com/softwareradiosystems/iris_modules into alohamac
Merge branch 'alohamac' of github.com:andrepuschmann/iris_modules into alohamac