db4o-sp Code-SVN

Deleted 3D algorithms - next development focused on 2D (with strategies for extensions to 3D).

Created robust kernel - sign of determinant (EGC with dynamic filter).

Created robust CG algorithms - orientation and isOnLine predicates.

Created robust line intersector - predicate is robust, intersection point computation based on homogeneous coordinates - approximately, but robustly (BigDecimal type with round off to double).

Created geometry and coordinate factories with interfaces.

Test cases (created and successfully passed):
1. Robust kernel
2. CG Algorithms
3. Line intersector