ST_Accum now return a GeometryCollection instance
Add triangle function
remove unused code
Fix pom
Add unit test for ST_UNION
Add unit test for ST_ACCUM
fix javadoc
Fix javadoc + header
Add unit test for ST_UNION
Merge pull request #76 from nicolas-f/st_accum

ST_Accum now returns a GeometryCollection instance
Add getFieldName from table and field id
Merge pull request #77 from nicolas-f/getfieldname

Add getFieldName from table and field id
Remove TableLocation from method signature
Add ST_MakeLine

TODO?: Add the spatiatial aggregate form available in PostGIS? See
    http://postgis.org/docs/ST_MakeLine.html
Test geometry equality correctly.

TODO: Apply this to all the other tests.
Make ST_MakeLine accept any number of points.

But still no aggregate version.
Add the aggregate form of ST_MakeLine

Usage:
```mysql
SELECT ST_MakeLine(ST_Accum(the_geom)) FROM input_table;
```
Clarify test for ST_PointsToLine, cf. ST_MakeLine
Make ST_MakeLine accept MULTIPOINTS

Still need to write unit tests
Add unit tests for (mixed) MULTIPOINT
Need at least two points when using MULTIPOINTS