Derive LIB_TABLE_ROW from boost::noncopyable for use in boost pointer
containers.
Use std::unique_ptr to manage PROPERTIES pointer.
Add clone support for boost pointer containers.
Split common library table code out from FP_LIB_TABLE into base LIB_TABLE
object. The FP_LIB_TABLE object only contains the code specific to
footprint library tables.
Use boost::vector_ptr for storing library table row objects.
Fix move up and down bugs in footprint library table edit dialog.
* if the current select plugin is the github plugin, one can select some of these libraries and add them to the table
* if the current select plugin is the kicad plugin, one can select some of these libraries and download them to make alocal copy.
They can added to the table after they are downloaded.