Updated documentation for bam2wiggle.py and bam_vs_gtf.py
Added new tests to bed2fasta.py and bam2wiggle.py
Fixed bug in bedgraph output from bam2wiggle.py
Removed BED and BIGBED output formats from bam2wiggle.py (use bam2bed.py)
Merge branch 'Scrum-apr-14' of ssh://github.com/CGATOxford/cgat into Scrum-apr-14