Prevent unnecessary auth challenge query
As requested
Remove unneeded NSURLConnectionDelegate methods
Merge pull request #51 from stripe/fix-auth

Prevent unnecessary auth challenge query
remove STPView & exception handling
clean up example
move example into separate project
remove unneeded frameworks
remove unneeded example files
update podspec and readme
remove paymentkit submodule
version and readme
readme
travis.yml
Add Parse backend to example app, update README
restructure project directory
minor tweaks
finish example, update README with migration guide