Bump version to 0.1.5

Signed-off-by: Kai Blin <kai.blin@biotech.uni-tuebingen.de>
drawClusters: Factor out ORF drawing logic

Signed-off-by: Kai Blin <kai.blin@biotech.uni-tuebingen.de>
Add drawUnorderedClusterOrf function

This allows to draw clusters where there is no real location information

Signed-off-by: Kai Blin <kai.blin@biotech.uni-tuebingen.de>