minor code cleanup
Merge branch 'master' of https://github.com/gsummer/CyNetLibSync

Conflicts:
	src/main/java/nl/maastrichtuniversity/networklibrary/CyNetLibSync/internal/serviceprovider/Neo4jPureRestConnector.java
modified the extensions to accurately reflect the parameters that where introducted to the neo4j extensions.
also added the mandatory ones to the execution of the extensions
updated the system to now properly download the extensions of the server and check them against a list of supported ones.

added the saveInGraph to the neonetworkanalyzer executor