Merge branch 'hotfix_442' into develop
updated docs
updated AUTHORS
hadut.run_pipes does not complain about nonexistent glob-like paths anymore
Allow hadoop version to use a plus

some older CDH versions use a + to delimit 'public' vs private versions
of Hadoop code, e.g. 0.20.2+320.

This change supports handling that signature in pydoop.hadoop_utils