Be more cautious in requesting a read-write buffer in CL1.2 image creation
Make get_devices() return an empty list instead of erroring out (reported by Tomasz Rybak)
Fix typo in get_devices empty fix
Add IPython integration
IPython doc fix
Add missing import to IPy demo notebook
Use the documented struct.calcsize to determine machine word size for better pypy support.
Merge pull request #37 from yuyichao/master

Use the documented struct.calcsize to determine machine word size for better pypy support.
Update compyte
Merge branch 'master' into cffi

Conflicts:
	.gitignore
	src/wrapper/wrap_cl.hpp
Make get_devices() return an empty list instead of erroring out (reported by Tomasz Rybak on the master branch)