RNA-SeQC 2.4.2

Bug Fixes:

• Fixed an issue preventing GC content statistics from being generated
• Fixed a long standing issue with --fasta references and crams (#50)

Other Changes:

• Bumped the rnaseqc python module to version 0.0.3
• Improved unit tests
• Added tests for, and warnings regarding cram/reference mismatches. htslib is a nightmare