Added the required github templates, made the required template changes

.github/ISSUE_TEMPLATE.md

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+<!-- Before filing an issue, please search the existing issues (both open and closed) to see if your report might be duplicate -->
+<!-- Please don't file an issue when you have a support question, send support questions to the mailinglist or ask them on Gitter (http://gitter.im/loklak/loklak) -->
+
+- Issue type: Bug report/Feature request <!-- delete the one that does not apply -->
+
+### Short description
+<!-- Explain in a few sentences what the issue/request is -->
+
+<!--
+If this is a bug report, use the following part of the the template and delete the part at the bottom
+-->
+### Environment
+<!-- Tell us about the environment -->
+ - Operating system: 
+ - Software version: 
+ - Software source: <!-- e.g. Github Repository, Downloaded Jar, installed via package managers -->
+
+### Steps to reproduce
+<!-- Tell us step-by-step how the issue can be triggered. Attach any screenshots if available -->
+1. <!-- step 1 -->
+2. <!-- step 2 -->
+3. <!-- step 3 -->
+
+### Expected behaviour
+<!-- What would you expect to happen when the reproduction steps are run -->
+
+### Actual behaviour
+<!-- What did happen? Please (if possible) provide the stack trace -->
+
+<!--
+Use the part below to file a feature request and delete the bug report part above.
+-->
+### Usecase
+<!-- Tell what you're trying to achieve, Describe _what_ the requested feature should do -->
+
+### Description
+<!-- Describe as extensively as possible what you want loklak to do -->

.github/PULL_REQUEST_TEMPLATE.md

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+### Short description
+I have:
+- [ ] There is a corresponding issue for this pull request.
+- [ ] Mentioned the Issue number in the pull request commit message `Fixes #<number> commit message`
+- [ ] There is only strictly only one commit per issue.
+
+### For the reviewers
+I have:
+- [ ] Reviewed this pull request by an authorized contributor.
+- [ ] The reviewer is assigned to the pull request.