fix bug
Update POM for history view with nodeJS and custom ungit
Update dendrite-server script to build/start/stop ungit
Update GraphExport to include projectId
UI: Add history page

Use HistoryService to snapshot graphs to git-backed directory on server,
which manages repo via ungit server

Conflicts:
	src/main/java/org/lab41/dendrite/web/controller/GraphExportController.java
	src/main/webapp/js/app.js
	src/main/webapp/js/controllers.js