Additional optimizations and further network support

This update includes support for new processing functions, such as ``mapstd` as well as the equivalent of L2 and zscore normalization implemented as input processing functions. In addition, multiple input and output processing functions can be chained together, increasing flexibility of the networks that can be carried over.

Additionally, the code no longer tries to tweak FFT parameters for different sampling rates. Instead, it implements a very crude resampling algorithm to do linear interpolation in order to resample the incoming audio.

Finally, there are small tweaks to the naming conventions in the text file.