Update to standard-readme format
Update to standard-readme format

* Formatted Markdown file
* Added lede at the top of file so a description paragraph will display on mobile
* Standardized Section names (e.g. Introduction => Install)
* Added standard QA section - TSC **must** requirement
* Expanded License to include copyrights
* Updated catalogue links to GitHub location
* Minor grammar corrections and text updates to improve the flow

[standard-readme](https://github.com/RichardLitt/standard-readme) is a simple standard naming convention for README files which makes reading and navigation of the documentation easier - this is a TSC **should** requirement

telefonicaid/iotagent-mqtt,telefonicaid/iotagent-json,telefonicaid/iotagent-mqtt,telefonicaid/iotagent-json,telefonicaid/iotagent-json,telefonicaid/iotagent-mqtt