* Use FPID instead of wxString in MODULE object.
* Use FPID instead of wxString when loading and saving files.
* Use FPID in COMPONENT object.
* Add wxString helper functions and comparison operators to FPID.
* Add fp_lib token to pcb and netlist file formats.
* Add code to load and save FPIDs to pcb file format.
* Fix segfault when deleting invalid footprint library tables in Pcbnew
in non footprint library table build.
* Fix bug when counting the number of mod files in
EDA_APP::SetFootprintLibTablePath();
* Encapsulate most of the MODULE class.
* Start encapsulating the DIMENSION class.
* Lay some groundwork for EDA_TEXT encapsulation.
* Move cleverly hidden MODULE functions into class_module.cpp.
* Use std::swap to exchange TEXTE_PCB values for undo/redo.
* Remove unused members from MODULE class.
* The usual coding policy and documentation fixes.