Add contributing guidelines, rename license

Author: gizmosachin

CONTRIBUTING.md

@@ -0,0 +1,11 @@
+### One issue or bug per Pull Request
+
+Keep your Pull Requests small. Small PRs are easier to reason about which makes them significantly more likely to get merged.
+
+### Issues before features
+
+If you want to add a feature, please file an [Issue](issues) first. An Issue gives us the opportunity to discuss the requirements and implications of a feature with you before you start writing code.
+
+### Forwards compatibility
+
+Please do not write new code using deprecated APIs.