ENH: Add issue template

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,20 @@
+<!--
+
+For questions related to querying Bloomberg data and usage of the underlying blpapi library please contact Bloomberg
+support.
+
+<--
+
+#### Code Sample, a copy-pastable example if possible
+
+```python
+# Your code here, this should be a minimal reproducible example, see https://stackoverflow.com/help/mcve
+
+```
+#### Problem description
+
+[this should explain **why** the current behaviour is a problem and why the expected output is a better solution.]
+
+
+#### Expected Output
+