Changed tcast to extended
Merge pull request #145 from izaid/tcast

Changed tcast to extended
Rename arrfunc_type -> arrfunc_old_type, funcproto_type -> arrfunc_type
Fix all but one test error
Update the python ctypes wrapping of arrfunc/ckernel
Merge pull request #146 from mwiebe/fpaf

change the funcproto to be arrfunc's type
Fix for 32-bit
Add release notes for 0.6.6 release