v1.2.0

Feature

• Add @mathpad_constructor to elec module where valid (806a4d6)

Fix

• Export all dimensions in from mathpad import * (eb06884)
• Rename precision arg to sigfigs for clarity (4154d4e)
• Rename SumDimensionMismatch to SumDimensionMismatchError (43b6b4e)

Documentation

• Update Walkthrough (123a981)
• Print docstr before returning in MathPadConstructor.repr_latex() (3882a7d)
• Document kinetic_energy constructor (04990da)
• readme: Small edits (f5ab81c)