fixed constructor bug and 2 element removal bugs
turned off autocommit as it doesn't work yet and kills the build
fixed test so build won't break
added commit staging tables to schema
decouple session id generation from persistent data store
added binders for transferring elements to staging
untested persistence code
persistent code, but not yet functioning - will break build
clean up graph construction
clean up graph construction
persisting single vertex passing tests
refactored amber to keep session elements as mostly sql objects
saving changes to AmberDb
Merge branch 'amber-sql' of github.com:nla/amberdb into amber-sql
judicious setting of h2 db type (mem, shared, file etc) to get all tests to pass
fixing code line formatting
Merge remote-tracking branch 'origin/amber-sql'

Conflicts:
	src/amberdb/AmberDb.java
	src/amberdb/sql/AmberGraph.java
	src/amberdb/sql/dao/PersistentDao.java
	test/amberdb/AmberDbTest.java
	test/amberdb/sql/AmberGraphDaoTest.java
	test/amberdb/sql/AmberPersistenceDaoTest.java