Merge pull request #20 from colinmollenhour/rebase

Various improvements and fixes
Merge pull request #21 from colinmollenhour/phone-fix

Fix phone number filter. noref
Added new configuration option for storing cards
Consuming the allow card saving configuration setting.
Merge pull request #22 from SecureSubmit/allow-card-saving

Allow card saving
Make securesubmit url use https when appropriate. noref
Merge pull request #23 from colinmollenhour/https-fix

Same-Origin Policy error when loading token data
Improve debugging, remove unneeded code.
Filter all non-digit characters from postcode. noref
Fix PHP notice: undefined variable. noref
Replace build-in 'trim' function with customer method as it is not supported in IE8 and earlier versions.
Added JSONP support to address issue #26
Merge pull request #24 from colinmollenhour/fix-postcode

Fix postcode
Merge pull request #25 from sergeykalenyuk/fixes

Replace build-in 'trim' function with custom method.
Merge pull request #27 from jerrylroberts/prototype_jsonp_support

Added JSONP support to address issue #25
Fixed trim() method for issue #25
Merge pull request #28 from jerrylroberts/master

Fixed trim() method for issue #25
Remove duplicate function. Fix indentation. noref