Improvements for version 1.8

[llrs]

Package

1. • Appveyor #10 Improve testing using Appveyor for testing in windows
2. • Taking advantage of GeneSetCollection #3 Improve test for coherence between using GeneSetCollections and not.
3. • Use case: classificate gene sets #8 Classificate gene sets.

[llrs]

Update news based on the comparison: RELEASE_3_8...master

These are pretty minor updates this time (but writing this in case I remember to update the news again with bigger changes)