Initial work for porting Slic3r::Config to XS
More work for porting Config to XS
More work for XS Config
Support bool options in XS
Support enum config options
Support for more array config types
Inline serialize() and deserialize() for ConfigOptionEnum
Decoupled a generic Config implementation from the PrintConfig definitions
Expose static PrintConfig objects to Perl and test apply()
Incomplete work for adapting the application to the new XS-based Config
Finished porting Config and option definition to XS
Adapt GUI to new XS Config
Satisfy test suite with new XS based config
Merge branch 'xs-config'

Conflicts:
	lib/Slic3r/Config.pm
	xs/MANIFEST