bam2bam.py - added unstrip option
sparse2full.py - output titles
bed2table.py - added length option, sorted out headers
bed2stats.py - added percentages
bam2bam.py - added unit tests, unstrip for paired sequences
pipeline_windows and pipeline_chipseq - various additions
Merge branch 'master' of ssh://github.com/CGATOxford/cgat
various small fixes to unit tests
merged changes from Andreas