Set icon for st
copyurl patch

Select and copy the last URL in the display. Multiple invocations cycle through
the available URLs.
Add .gitignore
Hide X cursor when typing.

Hide the X cursor when typing in the terminal. The cursor is displayed again
when the mouse is moved.
Add Kconfig

- Add Kconfig as a submodule and move most of the configuration
  options to a Kconfig file
- Make the terminal icon a configurable option