Merge branch 'stable'
Added authorization and capture services
rename config_opts to config
Removed duplicate create credit-card code
Added samples for authorization and capture
Add PayPal-Request-Id for only POST HTTP method.
Remove configuraton
Fixed indent
Fixed indent for samples.
Rename sample files
Update variable names
Update readme
Added credit_card#delete sample
Merge pull request #1 from DevTools/update-schema

Added authorization and capture services
Updated version number