added string include file
renamed typeutil and its functions
redid a bunch of the string natives
string natives now register
--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%40238
final revision of handle system (I hope!)
initial import of plugin handles
--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%40234