Version 0.130 - June 2014

1. Allowed the 'required if stream' attribute for tool arguments. This allows arguments
that are set as required to be nullified in the event that the input is a stream. In
particular, freebayes is set as requiring a bam index. If the input is a stream, however,
the index is not required as the whole bam file is to be processed.
Merge https://github.com/AlistairNWard/configurationClass