css classes cleanup
GV: tracks css class cleanup
New WS schema for variants. VariantWidget adapted to new schema
GV: Tracks id must be unique, and will be auto generated by default, modified genomeViewer and trackListPanel track management methods to work only with track instances instead of internal ids
updated version number
Merge branch 'release/1.1.4' into develop
bug fix on getTrackById
updated number version
Merge branch 'release/1.1.5' into develop
merge
Merge branch 'develop' of https://github.com/opencb/jsorolla into develop

Conflicts:
	src/genome-viewer/genome-viewer.html
	src/genome-viewer/genome-viewer.js
	src/genome-viewer/tracks/track.js
	src/lib/widgets/feature/file/file-widget.js
	src/lib/widgets/feature/info/gene-info-widget.js
	src/lib/widgets/feature/info/geneorange-info-widget.js
	src/lib/widgets/opencga/result-widget.js
	src/network-viewer/network-viewer.js