Update README.md with functionality of new plugin release

[maartenba]

Work in progress - do not merge yet.

Changelog of release:

• Support for Rider 2018.3 (only) Not compatible with rider 2018.3 EAP #74
• Azure Cloud Shell support Add Azure Cloud Shell support in Rider plugin #62
• Connect to cloud shell and work with terminal
  • Upload file action in Rider
  • Support download <file> command in terminal
  • Support for az aks browse command opening browser Cloud Shell: Support "url" backchannel message #102
• Add Sql Databases in Azure Explorer
  • List/delete servers and databases
  • Connect to database using Rider database tools
• Various bugfixes
  • Update logic to get project executable from publishable project #43
  • The name should be defaulted in the "SaveAs" dialog When saving a file from Azure storage #44
  • Deploy to Docker host should not mention .jar/.war #48
  • Resolve confusing message from build notification while publishing Web App #61
  • Use API calls to check if targets for publishing .net web apps on Windows exists #75

[sdubov]

@maartenba, ughh... sorry, missed your message :( please, let me know if you would like to revert.

[maartenba]

If we release, it's okay :-)