kwant.continuum wrappers

[seadra]

Hi,

Thanks for the nice work! Recent versions of Kwant has the continuum subpackage for creating the tight-binding system from an expression, and it'd be nice to have bindings for those.

[wrs28]

Thanks for pointing this out! I haven't really been updating this recently, so this is a good issue for someone to work on. I will probably not get around to it for at least two months.