Squirrel 2.2 stable released

[yagur]

Squirrel 2.2 stable released:

-added _newslot metamethod in classes
-added enums added constants
-added sq_pushconsttable, sq_setconsttable
-added default param
-added octal literals
-fixed debug hook, 'calls' and 'returns' are properly notified in the
same number.
-fixed a coroutine bug

http://sourceforge.net/project/showfiles.php?group_id=85893&package_id=138103&release_id=577260