Re-org release
- IPSpace::erase implemented
- Added "ex_netcompact.cc" example to compact networks.
- Code and packaging reorganization.
- Namespace and library name are now versioned.
- Got rid of the "++" in the names, too many complaints.
For SCons building, the part file is now "code/libswoc.part". The part name is "libswoc". The namespace and output library files are versioned.