Update pyftdi/spi/serialflash.py

Fix a typo in the M25PxFlashDevice class so that the _size is calculated correctly.
Added a flag to skip usage of the device cache.
Merge pull request #3 from endlesscoil/skipcache

Added a flag to skip usage of the device cache.
changes to support FT232H chip
removing debugging statements (print traceback)
removing spurious space character in comment
removing unneeded statements added for debugging
removing more unneeded statements that were added for debugging
switching to setuptools to aid in development -- allows 'python setup.py develop' to set up a live link to development repo
Revert "switching to setuptools to aid in development -- allows 'python setup.py develop' to set up a live link to development repo"

(Doing this in another branch to ease creation of pull request)

This reverts commit 28d90f0c64f877148193d373b8a6f12ea8365855.
Remove unsupported Prolific driver
Update documentation, and add a hint with OS X Mavericks
Merge pull request #2 from DavidWC/patch-1

Update pyftdi/spi/serialflash.py
Fix RST syntax
Merge pull request #4 from adamfeuer/ft232h

FT232h changes
Cosmetic fix, and update copyright year for modified files
Update AUTHORS file
Bump up version number to 0.7.0
Update dependencies: PyUSB is out of alpha stage, it's a bad idea to reverse it even if PyFTDI is able to work with pyusb 1.0.0a3 (alpha 3)
Use setuptools if available.
Update the API (resume work from rework-api branch)