working on 1d capacitor device example

using ViennaMesh's generation capabilities
1d capacitor compiles and executes
1d capacitor for different 'eps' values

using this example for the viennamaterials journal paper.
investigating coupling between model-based simulation parameter and simulation.

hijacking the 'eps' parameter of the Laplace equation used in semiconductor device simulation
in combination with new 'dummy' material providing a model-based eps parameter,
depending on the temperature
updated 1d capacitor example
Merge branch '1dcap' into next
add viennamesh to the viennamini lib dependency