Create issue template

[djmgit]

Create a template for submitting issues so that users do not forget to provide details like whether it is a bug or a feature request and other important information like what is the browser they are using (Chrome/Firefox) and version. Also issue template helps users/developers in reminding them important points like whether they have read the guide lines before submitting an issue or whether their branch is even with upstream etc.

Information on creating templates can be found here