mixture version 2.0.3 2021-03-02:
- Stochastic EM added.
- Stability fixes for skewed models added. 
- Reduced compilation time.
- pcm function added.
- t-eigen family added.

mixture version 2.0.2 2021-01-16:

- Fixed configure file

mixture version 2.0.1 2021-01-15:

- Fixes for solaris.

mixture version 2.0.0 2021-01-11:

- Cpp used.
- Missing data implemented. 
- Mixtures with skewed components (via variance-mean mixtures) added.
