added ref data required by tiff metadata extraction.
merged latest changes.
minor edit to force retest
Merge remote-tracking branch 'origin/master' into tiff
Insignificant edit to force a retest by Travis
Add test to schema creation

Determine if db failures are a result of schema not being created quickly enough
updated amberdb version
Update AmberGraph.java
added check for mime types to determine image or sound files and added closing of ambersession for unit test.
Merge remote-tracking branch 'origin/tiff' into tiff
code cleanup.
Merge pull request #178 from nla/tiff

Tiff