Also removed the negbandpass & neghighpass parameters
and replaced them with bandpass & highpass set to -1, to
fit the switches better to the GUI.
Closes#51, closes#173
The behaviour of the user-defined keybindings.yml was changed.
It now documents just the changes from the default keybindings.
An empty line with no action means "unbind the key".
Also includes a refactoring of the List: all methods that accepted
or returned a [from, to] range now return a Range, which is
non-inclusive i.e. [start,end).
Also the assignUnitIds was slightly refactored & a new function
called assignUnitIdsForPatch was added, to assign all unit IDs for
an patch at once.
Closes#157, #163.
