Version 2.30

Version 2.21

version 2.20

version 2.11

version 1.95

add two methods:
- Model.getDecfunCoef(…)
- Model.getDecfunBias(…)

version 1.94

version 1.92

version 1.91

closes #bwaldvogelgh-5

[maven-release-plugin] copy for tag v1.8

liblinear 1.71-weights