add issues template to repo

[SPlanzer]

Issues templates needs to be added. This will ensure issues are standardised and prompts are provided to those creating issues.

There should be templates for:

• Creating bugs

• Opening epic subtasks

• This may have to be retrospectively applied to all issues once a format is agreed

[SPlanzer]

pull request #45 opened against this issue. This should be a chance to discuss what information is required in sub-task and bug report issues

[SPlanzer]

closed by #45