Make possible to encode data in the app

[User1l0]

Using the internet to encode your data really makes this app unusable. I'll be very pleased if this app could fully function at it's own

[sz3]

While it's not in the app, the code that runs on the cimbar.org website is available to download and should work in your local browser, even when not connected to the internet:
https://github.com/sz3/libcimbar/releases/tag/v0.5.12

The easiest way to get it working (on android, for example) is probably to use the version packaged as a single html file: https://github.com/sz3/libcimbar/releases/download/v0.5.12/cimbar.html

(I should add this to the cfc readme)