Create ISSUE_TEMPLATE.md

Author: shardul89

.github/ISSUE_TEMPLATE.md

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+### New Issue Checklist
+
+* [ ] I have read and understood the [CONTRIBUTING guide](https://github.com/rs/SDWebImage/blob/master/.github/CONTRIBUTING.md)
+* [ ] I have read the [Documentation](http://cocoadocs.org/docsets/CFAlertViewController/)
+* [ ] I have searched for a similar issue in the [project](https://github.com/Codigami/CFAlertViewController/issues) and found none
+
+### Issue Info
+
+ Info                    | Value                               |
+-------------------------|-------------------------------------|
+ Platform Name           | e.g. ios
+ Platform Version        | e.g. 8.0
+ SDWebImage Version      | e.g. 2.1.1
+ Integration Method      | e.g. cocoapods / manually
+ Xcode Version           | e.g. Xcode 8.0
+ Repro rate              | e.g. all the time (100%) / sometimes x% / only once
+ Repro with our demo prj | e.g. does it happen with our demo project?
+ Demo project link       | e.g. link to a demo project that highlights the issue
+
+### Issue Description and Steps
+
+Please fill in the detailed description of the issue (full output of any stack trace, compiler error, ...) and the steps to reproduce the issue.
+