Add representation methods for `TensorMesh`

lheagy released this 26 Apr 23:16

fe80c45

from pr: #143
commits from: @prisae, @banesullivan
review from: @lheagy

This PR adds html and non-html representations which should be more generally applicable, for small and big TensorMesh's.

Based on work by @banesullivan on vtki and @prisae on the printversion-tool.

Assets 2