Adds setObject to CCConfiguration

also adds the test
ouch... restores bindings/generator repo
Merge branch 'configuration_set_value' of https://github.com/ricardoquesada/cocos2d-x into ricardoquesada-configuration_set_value
Minor fix in CCConfiguration.
Merge pull request #2757 from dumganhar/ricardoquesada-configuration_set_value-master

Merge PR #2728 and minor fix.[master]