Bump SNAPSHOT version to 0.3.0

The following commits will upgrade the SCIFIO dependency through
several backwards-incompatible versions, so we should not pretend
the scifio-omero code can stay at 0.2.x anymore.
Update to pom-scijava 1.136
Update to scifio 0.7.0

This commit contains the minimum necessary changes to resolve compile
errors due to backwards-incompatible changes in the version upgrade.
OMEROFormat: stop using deprecated imglib2-meta API
OMEROFormat: remove no-longer-needed hack
OMEROFormat: use scifio.metadata() service accessor
Update to scifio 0.8.0

This commit contains the minimum necessary changes to resolve compile
errors due to backwards-incompatible changes in the version upgrade.
Update to scifio 0.9.2

This commit contains the minimum necessary changes to resolve compile
errors due to backwards-incompatible changes in the version upgrade.
OMEROSession: clean up style