Added the config file for the max_results and the jql param.

[HikiMato]

No description provided.

[tomcoonen]

• Look at https://github.com/creacoon/laravel-dashboard-helpscout-tile for an example of the Readme config, should not be in an extra file since the dashboard has it's own config already
• Only use the config (directly), don't set any defaults when using it. That will be don in the config file.