Adds `orientation` and `justify` options to all modules and custom
widgets where it makes sense to do so.
Any modules without support document this. Widgets fully document the
options inline where present for now.
Resolves#296
This completely reworks the sysinfo module to add support for aggregate functions, better support for working with individual devices, the ability to specify units, and some string formatting support.
Several new tokens have also been added, and performance should be marginally improved.
BREAKING CHANGE: Use of the `sys_info` module in your config will need to be updated to use the new token format. See the wiki page for more info.
