v1.2.0

The biggest new feature is the possibility to map custom keyboard shortcuts, using a syntax like --map key-combination:action.

Other improvements:

• Add keyboard mapping to select the folder under the cursor and exit immediately. The default keyboard shortcuts are Alt-Enter and Ctrl-Space. (Github #39)
• Fix exiting with ctrl-c with --mouse=on (Github #45)
• Update dependencies
• Lots of small updates to readme