New DErivBase version 1.4:
- the old DerivBase resource loader (version 1.3) is renamed DerivBasePairs
- the new DerivBase resource is loaded with the DerivBase class
- updated the descriptions of the resource's new format: it contains rule paths and the confidence scores are computed from the path length
added the new DErivBase resource's artifact to pom.xml
Merge remote-tracking branch 'upstream/master'
updated the descriptions for the new DErivBase version 1.4
minor changes in DerivBaseResourceTest class to prevent GC memory errors
updated comments and descriptions to correspond to the new format (v1.4)
Merge pull request #390 from juliakreutzer/master

New DErivBase version 1.4 (re-opened)
Tested and it works well. I am merging it.