Fixes refresh problem when using templates

Solves #5

Adds Support for templates

Adds support for templating the image field:

• Jinja2 templates
• Javascript templates

Support for Actions

This release adds support for actions using tap_action config field.

Actions Supported

These are the supported actions:

• none
• toggle
• call-service

More info in the readme.

First version 0.1.0

First version of the card.