[FCS-40] Graph DB.
[FCS-40] Graph DB - Rexter.
[FCS-40]  Neo4j-embedded graph db.
[FCS-40]  Fixed requirements.
Merge branch 'master' into FCS-40

Conflicts:
	playbook.yml
	requirements.txt
Merge branch 'master' into FCS-40

Conflicts:
	playbook.yml
	requirements.txt
Merge branch 'FCS-40' of https://github.com/agh-glk/fcs into FCS-40
[FCS-40]  JPype.
[NT]  Add task form empty start links list bug fix.
[FCS-40]  Vagrant Jpype. Feedback in db and Management.
[FCS-40/FCS-36] Feedback in db and in Management.
[NT] 'www' removal from all urls.
Merge branch 'FCS-40'

Conflicts:
	fcs/fcs/manager/forms.py
[FCS-40] Feedback. Lowest priority bug fix.