AlignmentRenderer refactor. Next, multisample render.
Developed multisample alignment render.
Merge branch 'feature/opencga-0.3' of https://github.com/opencb/jsorolla into feature/several-alignments
modified track interface to allow different dom structures
updated height and autoheight calculations
Improved multisample render support. Work in progress.

It's necessary to add a sid in the opencga-adapter to test.
Improved multisample drawing.
changed hardcoded bam
merged opencb/gv:multialignment