Merge pull request #10 from chemo318/develop

Begin work on NSS Sync policy
Merge pull request #11 from chemo318/develop

Update Nodes and Steps with dummy GMA data; small fixes for some models
Implemented ValidateUser and PrepareOutgoingData policies for sync service
Merge pull request #12 from petekrull/develop

+ Implemented ValidateUser and PrepareOutgoingData policies for sync servi...
Add support for updating the transaction log on changes