v1.4 update

This update brings you buttplug.io's Intiface server integration!

If you have compatible devices, you can use their Intiface Central software to connect to them, connect Heat Control to your software, and play in new ways!

https://buttplug.io/
https://intiface.com/central/

Also, we got rid of the ad in the APK! We managed to now build it ourselves using Cordova.

Full changelog:

- Added support for Buttplug.io Intiface connection.
- Added calibration option for vibration.
- Added max vibration option for cum steps.
- Added option to change steps speed.
- Added separate picture change speed for cum step.
- During gameplay, pictures now get bookmarked to later be added to lists.
- APK now built with Cordova: no ad on closing the app.