Refactoring, please note this temporarily breaks a few tests.

Changes:
1) Allow users to use this module from Java API as well without having to pass in a map of Strings as config and remember the maxChanges config key. So parsing configuration from a config file is the responsibility of the bootstrapper, whist the module itself gets a strongly typed config object
2) Not sure this is the best solution (can discuss), but there is a convention in the framework that all nodes with label starting with _GA_ and all relationships with type starting with _GA_ get excluded by the "business" inclusion strategies. So I just renamed the labels and relationships we use and got rid of custom (anonymous) inclusion strategy. This allows users to pass in custom strategies that exclude even mode stuff
3) Got rid of pruning context - should not be needed if the framework behaves correctly. Added 5s delay for the pruning
4) Temporarily got rig of maxChanges in the ChangeFeed - to be discussed, but I think users should select how many changes they want on per-query basis. The configuration for pruning (i.e. how many changes to keep) is a different value from how many a user might want
changed ChangeFeed to be a repository of changes, implementing and interface (potentially leaving the option of storing the changes elsewhere)
create the root and initialise the sequence in a newly created start() method (framework), no need for any sychronized blocks any more
javadoc, cleanup, removed the check for mutations, because that is performed by the framework and the module will not be called if no changes occurred
refactoring: cleared up responsibilities of the repository (which has all the knowledge of how to store changes and where, including sequences) and module, which just delegates to it, change timestamp from Data to long to leave formatting up to the users.
cleanup
cleanup
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/main/java/com/graphaware/module/changefeed/ChangeFeedModule.java
luanne's default back