v0.5.0

Introducing a major update: replacing ctypes with pybind11 library.

Implemented enhancements

• FilReader.bandpass(): Divide by samples read, rather than total samples in the filterbank #7 (David-McKenna)
• pybind11 update #4 (pravirkr)

Added

• coverage tests with 3b71ff0.
• online docs on the readthedocs platform with 25a4881, e9a3aa2, bb11a35.

Changed

• setup.py for pybind11 and search fftw3 dirs with 4aee12c, f0f3f91.
• Fixed cyclic import with 9248ed0.
• Python API to load pybind11 modules with 4034d10.

Removed

• old C codes with 17c84d2.
• Switched to cpp standard Mersenne Twister engine with 850bb10.