0.3: Improvements and new simulation and burst detection modules

Many improvements have been made since the last release.

1. Module to detect if an oscillator is present in a signal (burst.py)
2. Module to simulate data with neural oscillations (sim.py)
3. Improvements to waveform shape analysis (shape/cyclefeatures.py)

Other updates included an updates SCV (spectral coefficient of variation) function, a dockerfile, updated documentation, and fixing a few miscellaneous bugs.