Move ST_TriangleContouring, as a table function
Fix wrong iso applying on Countouring
Add code coverage plugin
More coverage
Add unit test contouring
coverage of 79 percents
Merge remote-tracking branch 'irstv/master' into triangle_contouring

Conflicts:
	h2spatial-ext/src/main/java/org/h2gis/h2spatialext/CreateSpatialExtension.java
Fix merge imports
Add remarks on function
Fix unit test
Fix ST_TriangleContouring
Move internal class
Fix javadoc
Merge pull request #229 from nicolas-f/triangle_contouring

Add ST_TriangleContouring