[stream] removed unused argument from an unused routine :-)
[kepler] removed unused LIBS
[problems/*] applied .equals. and .notequals. operators where necessary
[bin/rpm] updated piernik-mpich2 package
[bin/rpm] added piernik-openmpi package
Merge pull request #54 from gawrysz/cosmetics

Cosmetics
Merge branch 'master' of github.com:piernik-dev/piernik into fargo_AMR