dotnet-installer/ISSUE_TEMPLATE

## Expected  behavior


## Actual behavior


## Steps to reproduce


## Environment data
`dotnet --version` output:
Adding ISSUE_TEMPLATE Addin template for new issues. Also adding instructions for "clone, run, repro" that we want to be at. 2016-02-26 23:22:33 +00:00			`## Expected behavior`


			`## Actual behavior`


			`## Steps to reproduce`


			`## Environment data`
			`dotnet --version` output: