Moved ownership of Config, when running the Neo4j Server, to the Server rather than IAGDB.

o Introduces new constructors for the embedded, highly available and impermanent graph databases
  that allows passing in Config directly. This was not added to the GDBFactory classes, since it
  is not meant to be a user-facing feature.

o Refactored the NeoServer and Database related classes to take advantage of this, and allow injecting
  config into the database used.

  Overall, this is a move towards consolidating the config for the whole product, eventually moving us
  to use a single config file. It is also a move towards further structuring the application to have
  shared components, owned by the assembly class which, in the case of the server, is NeoServer.

--
Adds multi-hosting service to Neo4j Server.

 o Adds a configuration database to the Server, containing
   meta data about hosted databases.
 o Adds database registry, managing live hosted databases.
 o Adds runtime reconfiguration of databases - dropping, creating,
   changing config and mode.
 o Contains several provisions ensuring full backwards compatibility
   with previous 'db' database and it's associated configuration.
   If a legacy config file exists, it overrides hosted config.
 o This commit *only* contains these new services, they are not
   plugged in. This is meant to incorporate this piece-meal by
   first moving the new code in, and plugging it in in a follow-up
   commit.

Conflicts:
	enterprise/com/src/test/java/org/neo4j/com/ServerTest.java
Redid some of the ignored UniqueIndexAccessorCompatibility tests in terms of UniqueConstraintCompatibility.

The populating IndexUpdater test, however, is not equivalent to the test it replaces, because our
pessimistic concurrency control seems to make some of those particular scenarios in the old tests,
impossible to hit through the public API.

The work of rewriting the tests is not yet done. This is just a step of the way.
Implement replacements for all the ignored index compatibility tests
Remove unused code from unique indexes.
Replace CTDouble with CTFloat

And replace use of "Double" with "Float" in error messaging and tests
Merge pull request #1938 from cleishm/ctfloat

Replace CTDouble with CTFloat
Fix for a division by zero issue when migrating and empty db

Problem was that the legacy node store reader read one too many records so
whereas zero total nodes was reported, one was read and reportProgress
broke with division by zero (... / totalEntities).
Make the LoadCSVTest pass

As it turns out, this test wasn't even running because of the missing
RunWith[JUnitRunner] annotation and it's bitrotted since it was written.
Migrate CypherParsetTest to FunSuite

It doesn't seem to run from mvn
Add the missing RunWith annotation to StringLiteralTest
Fix licenses in cypher-docs to include opencsv
Make browser detect LOAD CSV as a valid query start and add highlighting for split, toInt, toFloat
Add instructions on where to add a new Cypher keyword to browser README.md
Don't add a node to empty graphs in live console.
Add :help LOAD CSV to browser
Merge pull request #1941 from jakub-/loadcsvtest

Make the LoadCSVTest pass
Merge pull request #1942 from jakub-/cypherparsertest-funsuite

Migrate CypherParsetTest to FunSuite
Increate test timeout hoping that it'll be less likely to fail on the virtual build servers.
testing pr builds in team city, will revert