add templates to issues/prs

Author: ddavison

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,21 @@
+## Meta -
+Image(s):  
+<!-- node-chrome? hub? standalone-firefox? -->
+Docker Version:  
+<!-- 2.53.1, 2.53.1-americium, etc -->
+
+<!-- NOTE
+FIREFOX 48+ IS ONLY COMPATIBLE WITH GECKODRIVER.
+
+If the issue is with Google Chrome consider logging an issue with chromedriver instead:
+https://sites.google.com/a/chromium.org/chromedriver/help
+
+If the issue is with Firefox GeckoDriver (aka Marionette) consider logging an issue with Mozilla:
+https://bugzilla.mozilla.org/buglist.cgi?product=Testing&component=Marionette
+
+If the issue is with PhantomJS consider logging an issue with Ghostdriver:
+https://github.com/detro/ghostdriver
+-->
+## Expected Behavior -
+
+## Actual Behavior -

.github/PULL_REQUEST_TEMPLATE.md

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+- [ ] By placing an `X` in the preceding checkbox, I verify that I have signed the [Contributor License Agreement](https://github.com/SeleniumHQ/docker-selenium/blob/master/CONTRIBUTING.md#contributing-code-to-selenium)