This PR fixes how the Python examples are run with Sphinx gallery/ nbsphinx
Executing the examples and notebooks is disabled to allow the docs to be built on Read the Docs eventually (if it is enabled nest, neat, and neuron need to be installed, which is not possible on Read the Docs due to timeouts).
This also means the local environment does not need all of these tools to build the docs.
This PR fixes how the Python examples are run with Sphinx gallery/ nbsphinx Executing the examples and notebooks is disabled to allow the docs to be built on Read the Docs eventually (if it is enabled nest, neat, and neuron need to be installed, which is not possible on Read the Docs due to timeouts). This also means the local environment does not need all of these tools to build the docs.
The path to the images is also corrected.