Merge branch 'stable-php5.3' into namespace-php5.3
Change the minimum requirement of the SDK
Merge pull request #12 from RamyTalal/patch-1

Change the minimum requirement of the Core SDK
Fix Core SDK v2.5.x compatibility
Merge branch 'RamyTalal-patch-1' into namespace-php5.3

sdk_name and sdk_version set properly
Merge branch 'namespace-php5.3' into stable-php5.3

Merge in master with user agent handling