add github issue_template & pull_request_template

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,16 @@
+### Descriptive summary
+
+Include a concise description of the issue and any relevant tracebacks if you're reporting a bug.
+
+### Expected behavior
+
+### Actual behavior
+
+### Steps to reproduce the behavior
+
+1. Do this
+1. Then do this...
+
+### Related work
+
+Link to related issues or prior related work here.

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,20 @@
+Fixes #issuenumber ; refs #issuenumber
+
+Present short summary (50 characters or less)
+
+More detailed description, if necessary. Try to be as descriptive as you can: even if you think that the PR content is obvious, it may not be obvious to others. Include tracebacks if helpful, and be sure to call out any bits of the PR that may be work-in-progress.
+
+Description can have multiple paragraphs and you can use code examples inside:
+
+``` ruby
+class PostsController
+  def index
+    respond_with Post.limit(10)
+  end
+end
+```
+
+Changes proposed in this pull request:
+* 
+* 
+*