v.3.0

Added parabolic_stop into .fit() function.
Allows to use huge n_components and later do not think about their number: BIC search stage will stop automatically as soon as it will found parabolic-like minimum in BIC.
Default value of parabolic_stop is -1 (i.e. do not use this mode)
Recommended value when using huge n_components number : 0.7

v.2.1

Added correct detection level calculation using theoretical chi-square distribution

v1.0

Initial release.
Supports speed improvement at stages 1,3
Support custom significance levels at stages 2,4