Merge pull request #14 from amitpatelinfo/di

S4852 : IFrame : WMS POST issue resolved and IFrame is being extended
S4846: added functionality to get capabilities of a layer.
Merge pull request #15 from Abhay-Joshi-Git/di

S4846: added functionality to get capabilities of a layer.
Build latest code and add a README for releasing a Drilling Info build of OpenLayers.
Add tagging info to build instructions.