The first author want to thank Alison L. Marsden, Weiguang Yang, and Mahdi Esmaily-Mohgadam for discussions and code for Example 2 and 3, and for hosting the first author during the summer 2012. Furthermore, Dag Sverre Seljebotn provided the code for the Cython wrapping in example 3. Mikael Mortensen provided the code for the Probe in Example 1.