Merge pull request #282 from fgiannar/develop

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Merge pull request #283 from fgiannar/develop

updates
Merge pull request #285 from fgiannar/develop

fixes #284, updates #12
#12
The path of the img that is now returned is:
/resources/graphs/1378123450430.png, so the full path in my case is
http://cassandra.iti.gr:8443/cassandra/resources/graphs/1378123450430.png

(this is valid only for newly created graphs and clusterings

Also the "img" was added on the following requests :
    GET /cassandra/api/scn?prj_id="prj_id" (to get the csn graph image)
    GET /cassandra/api/scnclusters?graph_id = "graph_id"
    PUT /cassandra/api/scnclusters
Closed #286
Merge branch 'develop' of
https://github.com/cassandra-project/platform.git into develop

Conflicts:
	tests/clusterparams.json
Add ids of thermal and lighting modules in the installation schema
Merge pull request #68 from cassandra-project/develop

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