Ycad - Java CAD library SVN Repo

1) Implement proper color activity.
2) Implement ESpace, PSpace, MSpace.

Connect layer in add entity methods.

1) Use new basse entity class structure.
2) Remove unused code.

1) Use new base entity class structure.
2) Redo user parameter processing and add bgcolor parameter.

Use new base entity class structure.

1) Use new base entity class structure.
2) Redo user parameter processing and add bgcolor parameter.
3) Begin new color code.

Use new base entity class structure.

1) Redo user parameter processing and add bgcolor parameter.
2) Change comments.

Remove unused code.

Implment 3D polygon mesh.