* Add code for loading, modifying, and saving the global and project
footprint library tables.
* Add code to load MODULE objects using the footprint library table to
the footprint viewer.
* Add static methods to FP_LIB_TABLE to support loading footprint library
tables.
* Fix a bug when full file name and path are passed to FOOTPRINT_INFO::
ReadFootprintFiles() which I created in bug fix lp:593989.
* Fix a wxString debug assertion in EDA_APP::InitEDA_Appl() when the KICAD
environment variable is defined as an empty string.
* Add error dialog when libraries cannot be found in system search path
when loading footprint using the select footprint dialog.
* Add footprint library name column to the EDA_LIST_DIALOG when selecting
footprints from the list.
* Allow reading all columns from the selected row in EDA_LIST_DIALOG.
* Remove redundant sort from EDA_LIST_DIALOG constructor
* Add library name member variable and accessors to FOOTPRINT_INFO.
* Make headers translatable for Eeschema select component from list dialog.
* Add some helper methods to FPID for identifying the FPID type and validity.
* Remove a bunch of trailing whitespace and add missing license comments.