Updated from v0.0.4 to v0.0.5. Added python wrappers with swig and made minor changes to some function interfaces.

Added method 'get_library_version' that returns a formatted string with version information. updated to v0.0.4

Updated methods that generate .pcb file from individual files to accept a pcb_id and include it in the resultin file. Updated fro v0.0.2 to v0.0.3

Various changes driven by the need to generate a pcb dataset of partial placement. Updated from v 0.0.1 to 0.0.2

Added '-fPIC' compile option to the Makefile. Required for generating shared libraries by swig later.