chore(ISSUE_TEMPLATE): create issue template

Author: christopherthielen

ISSUE_TEMPLATE.md

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+This is a:
+
+- [ ] Bug Report
+- [ ] Feature Request
+- [ ] General Query 
+
+My version of UI-Router is: (version)
+
+
+
+# Bug Report
+
+#### Current Behavior:
+
+(current behavior here)
+
+#### Expected Behavior:
+
+(expected behavior here)
+
+#### Link to Plunker that reproduces the issue:
+
+http://bit.ly/UIR-Plunk
+
+
+
+
+# Feature Request
+
+(feature request here)
+
+
+
+
+# General Query
+
+Please direct general implementation questions to StackOverflow: 
+http://stackoverflow.com/questions/ask?tags=angularjs,angular-ui-router
+
+Please review the Sample Application which highlights common approaches:
+https://github.com/ui-router/sample-app-ng1
+
+- [ ] I have already asked my question on StackOverflow and nobody could answer the question
+
+- [ ] I have already reviewed the sample application for examples of common approaches
+
+- [ ] I believe my question can only be answered by the UI-Router maintainers
+
+
+(general query here)