issue template

ISSUE_TEMPLATE.md

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+
+For better utilizing the limited amount of human resource, please include the following
+information when reporting an issue. Issues which does not follow this
+instruction may be immediately closed without review.
+
+```
+uname -a
+ros --version    # if roswell runs successfully
+ros config
+```
+
+## How to reproduce it
+
+```sh
+
+
+```
+
+## Expected behavior
+
+```sh
+
+
+```
+
+## Actual result
+
+```sh
+
+```
+