Merge pull request #21 from nla/amber-sql

Amber sql
Update AmberGraphDaoTest.java

Test was persisting graph to user's home directory. This caused elements to persist across testing which caused the test to fail. Now use in memory databases.
add visability to begin and resume methods
increment patch number
Merge pull request #22 from nla/methodVisibility

Method visibility
fix for bug in creating sessions
Merge branch 'master' into amberSession
Merge pull request #23 from nla/amberSession

Amber session
merged the latest changes from master branch.