Replaced the link to obsolete Pyfft with the link to Reikna.
Merge pull request #22 from Manticore/pyfft-to-reikna

Replaced the link to obsolete Pyfft with the link to Reikna.
PEP8 dump_properties
Quote CL include path (in case there are spaces)
Revert "Quote CL include path (in case there are spaces)"

This reverts commit e1a30b51722e7b09d7a04ec85914b4c2fcf9790e.
Add cl.array.diff
Fix with_queue for queue=None
Improved pure-py version of Mandelbrot demo
Test, slightly modify strides treatment in Array.view()
Add future imports for with statement use in tests
Fix reduction when no_sync_size <= group_size (spotted by Alex Nitz)
Remove non-free matmul example (reported by Tomasz Rybak)
Add more error checking to overloaded operators in array
Doc hacking
Return empty list if no devices found in get_devices()