Add some more info in ISSUE_TEMPLATE.md, some text cleanup (tensorflo…

…w#4065)

Clarifies what kind of issues should be reported and what we will close, asks people to try searching on the web for similar issues first, asks for a minimal reproducible example.

ISSUE_TEMPLATE.md

@@ -1,4 +1,5 @@
-GitHub issues are for bugs / installation problems / feature requests.  
+NOTE: Only file GitHub issues for bugs and feature requests.  All other topics will be closed.
+
 For general support from the community, see [StackOverflow](https://stackoverflow.com/questions/tagged/tensorflow).
 To make bugs and feature requests more easy to find and organize, we close issues that are deemed
 out of scope for GitHub Issues and point people to StackOverflow.
@@ -7,6 +8,8 @@ For bugs or installation issues, please provide the following information.
 The more information you provide, the more easily we will be able to offer
 help and advice.
 
+### What related GitHub issues or StackOverflow threads have you found by searching the web for your problem?
+
 ### Environment info
 Operating System:
 
@@ -15,21 +18,19 @@ Installed version of CUDA and cuDNN:
 
 If installed from binary pip package, provide:
 
-1. Which pip package you installed.
+1. A link to the pip package you installed:
 2. The output from `python -c "import tensorflow; print(tensorflow.__version__)"`.
 
 If installed from source, provide 
 
 1. The commit hash (`git rev-parse HEAD`)
 2. The output of `bazel version`
 
-### Steps to reproduce
-1.
-2.
-3.
+### If possible, provide a minimal reproducible example (We usually don't have time to read hundreds of lines of your code)
+
+
+### What other attempted solutions have you tried?
 
-### What have you tried?
-1.
 
 ### Logs or other output that would be helpful
-(If logs are large, please upload as attachment).
+(If logs are large, please upload as attachment or provide link).