Create the issue and PR templates under the .github folder

.github/ISSUE_TEMPLATE.md

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+Welcome, dear friend! We, the rest of the NativeScript community really
+appreciate your feedback! While we are doing all we can to take care of every
+issue, sometimes we get overwhelmed. Because of that, we will consider issues
+that are not constructive or report problems that cannot be reproduced "dead".
+In accordance, we will treat feature requests or bug reports with unanswered
+questions regarding the behavior/reproduction "dead". All "dead" issues will
+get closed.
+
+## Please, help the others with the details below:
+
+### Did you verify this is a real problem with a search in [StackOverflow](http://stackoverflow.com/questions/tagged/nativescript)?
+
+### Tell us about the problem
+
+### Which version of NativeScript did you use (check the 'version' atrribute in the node_modules/tns-core-modules/package.json file)
+
+### Try to recall what were you doing
+
+### Is there code involved? Can you share the minimum of it to get the problem?
+

.github/PULL_REQUEST_TEMPLATE.md

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+Dear friend, we, the rest of the NativeScript community thank you for your
+contribution! As we want to present a really nice, readable changelog with each
+release, we ask you to fill the following information:
+
+### Inform what relation and with with issue does it have (in other words, delete the unnecessary):
+Fixes/Implements #[Issue Number].
+
+### Does it have [unit tests](https://github.com/NativeScript/NativeScript/blob/master/running-tests.md)?
+If not, why?
+If not, can you list any steps to test it manually?
+
+