Merge for single nodes with properties

 o Removed OR syntax for labels in MATCH
 o Added syntax for literal maps in MERGE for nodes
Imports
Merge pull request #707 from systay/merge

Merge for single nodes with properties
Merge pull request #706 from chrisleishman/cleanup_after_1_8_removal

Replace testFrom1_9 with testAll
Refactored NodeFetchStrategy

o Renamed StartItemWithRating to RatedStartItem
o Introduced the NodeStrategy trait
o Moved strategies into separate objects
Update the webadmin guide with new 2.0 concepts.

o Learn deck now includes labels
o Develop deck uses labels
o Develop deck does not use START anymore
Ignoring HA tests to be fixed in master.
Updated server readme
REST transactions: improved result serialisation.

o Improve unit testing of ExecutionResultSerializer.
o Redesign of ExecutionResultSerializer.
Fixes problem where the lucene index provider couldn't be loaded due to unsatisfied dependencies, during batch insertion
Log serialisation errors instead of e.printStackTrace().
Added a test for an issue with create/drop/create an index (where two IndexDefinitions were created). But the issue seems to have already been fixed
Merge pull request #710 from tinwelint/2.0-lucene-batch-insert-load-fix

Fixes problem where the lucene index provider couldn't be loaded due to ...
Add parser version enumeration