Merge 'autocast' into 'trunk'

Merge 'autocast' into 'trunk'

r7381@hlagh (orig r7380):  ribasushi | 2009-08-24 17:07:58 -0400
Branch to add autocast support as a standalone piece of code
r7382@hlagh (orig r7381):  ribasushi | 2009-08-25 05:06:43 -0400
Move storage tests to their own dir
r7385@hlagh (orig r7384):  ribasushi | 2009-08-25 06:35:19 -0400
Switch storage class loading to ensure_class_loaded
r7386@hlagh (orig r7385):  ribasushi | 2009-08-25 06:37:48 -0400
Change a datatype for test purposes
r7387@hlagh (orig r7386):  ribasushi | 2009-08-25 06:45:35 -0400
Fix two storage tests
r7388@hlagh (orig r7387):  ribasushi | 2009-08-25 06:45:52 -0400
Actual autocast code
r18697@hlagh (orig r7416):  caelum | 2009-08-29 01:42:29 -0400
rename method and add docs
r18698@hlagh (orig r7417):  ribasushi | 2009-08-29 02:07:18 -0400
Make sure arrays work
r18699@hlagh (orig r7418):  caelum | 2009-08-29 02:11:14 -0400
rename _map_data_type to _native_data_type