Manage null values in ST_ACCUM
Improve st_transform to support all single multi-geometries
Make some small corrections
Allow mixed LINESTRINGS,MULTILINESTRINGS ST_Graph
Merge pull request #333 from nicolas-f/fix/st_accum

Manage null values in ST_ACCUM
Merge pull request #338 from ebocher/st_transformFilter

Improve st_transform to support all single multi-geometries
Now we use a geometry filter operation. Please read #307
Fix OSGi test
Merge pull request #337 from agouge/st-graph-type-check

Allow mixed LINESTRINGS,MULTILINESTRINGS ST_Graph
Before, `ST_Graph` raised an exception if the input table contained both
`LINESTRINGS` and `MULTILINESTRINGS`. Now we allow for this possibility.

If we find a Geometry other than `LINESTRING` or `MULTILINESTRING`, we raise an
exception with the type.
Detect H2 database in TableLocation.parse
Don't ignore schema
Don't drop tables automatically
Make tableExists not use DB metadata
Add unit tests related to #340