Add R0 construction parameter
Merge branch '0.2.1' into 0.3

Branch 0.2.1 should never have been created, the code relates to the 0.3 version of concraft-pl.
Bump version
Add info about pre-trained models and the homepage
Merge master
Use R0T type from concraft library
Merge pull request #7 from kawu/0.3

0.3