Fix "Fatal error: Cannot use object of type stdClass as array"

Make sure that the "backingData" property's value will always
be converted to an array.
Merge pull request #178 from complex857/patch-2

Fix "Fatal error: Cannot use object of type stdClass as array"
Fixed warnings when open_basedir directive set
Removed GET processing from CanvasLoginHelper.
Merge pull request #185 from SammyK/fix-for-open_basedir-directive

Fixed warnings when open_basedir directive set
Merge pull request #194 from facebook/gFosco.canvasGET

Removed GET processing from CanvasLoginHelper.
Updated visibility of FacebookSession::
Merge pull request #196 from facebook/gFosco.session-appsecret

Updated visibility of FacebookSession::useAppSecretProof
Updated testing version constraints
Merge pull request #198 from GrahamCampbell/patch-1

Updated testing version constraints
Corrected a typo
Merge pull request #200 from GrahamCampbell/patch-1

Corrected a typo
[4.1] Disambiguate versions
Merge pull request #203 from SammyK/update-readme-badge-4.1

[4.1] Disambiguate versions
Reverted URL encoding behavior on FacebookRedirectLoginHelper
Refactored request/response.
Merge pull request #169 from SammyK/simple-request-response-refactor

[4.1] Simple request response refactor
Started to update docs to 4.1 syntax
Added TravisCI
Fix for tests always failing when default timezone not set