Adds aggregating JUnitInterval implementation.

Refs #79
Makes JUnit transfers smaller (shrinked from 1.6MB to <200k.)

Refs 79
Catches error on database access.

Refs #104
Moves JsonifiedDouble to Network package, where it belongs.

Refs #79
Extracts Perspective Listener.
Return 413 instead of 404 for large body sizes
(Disabled) test for large body sizes
Merge branch 'master' of github.com:TestRoots/watchdog
Merge branch 'master' into performanceChasing

Conflicts:
	WatchDog/src/nl/tudelft/watchdog/logic/document/Document.java