Proper cleanup on session destruction
Merge remote-tracking branch 'upstream/master'

Conflicts:
	dataset/domain/src/main/java/edu/dfci/cccb/mev/dataset/domain/simple/ArrayListWorkspace.java
Lifecycle utilities
Merge pull request #537 from apartensky/master

Tcga Presets - filter/sort preset list, limit 50, 'working ...', carry annotations over to the dataset.
Merge pull request #538 from lev-kuznetsov/master

Proper session cleanup