Fixing issues mainly to take care of the review comments from reviewers.
    1. Correcting Type errors in conformance/bindingTesting/queues folder.
    2. Changing names for test cases verifying : INVALID_EVENT_WAIT_LIST.
    3. Replacing 'invalid_object' with WebCL object after its release. [SRA Issue#252]
    4. Adding testcases to verify exception for extension : WEBCL_html_video [SRA Issue#257]
    5. [Khronos Issue#8] Adding testcases to verify exception for extension : WEBCL_html_image [SRA Issue#255]
    6. Modifying signature of createImage for extension WEBCL_html_image [SRA Issue#256]

    Contributors :
    SRI-B : Shilpa Shri, Sharath Kamath.
    SRA : Antonio, Steven and Igor.

    Details on changes is available at master_r12232013 branch:
    https://github.com/SRA-SiliconValley/webkit-webcl-conformance.git.