Adds .github CODEOWNERS and ISSUE_TEMPLATE

- Adds .github/CODEOWNERS to assign reviews
- Adds .github/ISSUE_TEMPLATE/ with bug_report and feature_request

Only two lines differ from ZebraDevs/fetch_gazebo#71

.github/CODEOWNERS

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+# This file allows changes in specific paths to automatically request review from individuals.
+# See https://help.github.com/articles/about-code-owners/ for details.
+
+# Default all changes to the fetchrobotics opensource team.
+* @fetchrobotics/opensource

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: "[BUG] short description"
+labels: bug
+assignees: moriarty
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+The steps to help us reproduce this error.
+We recommend using Docker to ensure your setup is as clean as possible, or using a new catkin workspace.
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots or links to YouTube.
+
+**catkin workspace (please complete the following information):**
+ - fetch_ros version:
+ - Ubuntu version:
+ - ROS version:
+ - current catkin workspace information `wstool info`
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: "[feature] short description"
+labels: enhancement
+assignees: moriarty
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.