added ggplot requirement
added gtf2gtf proteincoding filter to server ENSEMBL >=78
Merge branch 'master' of ssh://github.com/CGATOxford/cgat
Merge branch 'master' of ssh://github.com/CGATOxford/cgat
reduce memory consumption further in bam2wiggle unit tests
pep8 changes
Merge branch 'master' of ssh://github.com/CGATOxford/cgat
pep8 changes