Added demo12.jsp for Dynamic ConfigXML demonstration
Extended bbb-api.jsp to support dynamic configXML example
Fixed few errors on demo12.jsp
Adjusted bbb-api.jsp to support POST with different contentTypes
Made error messages consistent on setConfigXML
Updated config.xml and removed hardcoded IP address
Merge pull request #118 from jfederico/master

Example of how dynamicConfigXML can be used