classtoi: more features than class-toi light; everything is just as fast except class creation.
1.0.0:
	- Initial version.

classtoi-light: only the minimum features.
1.0.0:
	- Initial version.

classtoi-heavy: all the features and the slowness, not recommended anymore.
0.1.4:
	- :new non-nil custom returns values now replace the usual returned instance
	- Custom inherited __index metamethods are now called on the correct class instead of the class it is defined in.
	- Added tests.
0.1.3:
	- Added __name attribute in BaseClass for a more informative __tostring.
	- Fixed instanciation error when no custom :new method is defined.
0.1.2:
	- Calling class.new(table, ...) now call the class constructor on the table instead of creating a new object.
0.1.1:
	- Fixed a lot of bugs of the default class __tostring.
0.1.0:
	- Initial version.