added first draft of screenshot resource
- corrected foreach loop in usecase view
- first draft of scenario overview
added angular cookies
Merge branch 'master' of https://github.com/forkch/ngUSD

Conflicts:
	ngUSD-server/src/main/java/ngusd/dao/ScenarioDocuFilesystem.java
scenario overview
Merge branch 'master' of https://github.com/forkch/ngUSD
typo