add description of structural mounts (thanks @sdeinert) #178

	name: Validate example files
	on: [push]
	jobs:
	test:
	runs-on: ubuntu-latest
	defaults:
	run:
	shell: bash -l {0}

	steps:

	- name: Checkout Repository
	uses: actions/checkout@v3

	- name: Set up Python
	uses: conda-incubator/setup-miniconda@v2
	with:
	activate-environment: anaconda-client-env
	auto-activate-base: false

	- name: Create new conda environment
	run: \|
	conda create -n cpacs python=3.9

	- name: Activate new conda environment
	run: \|
	conda activate cpacs

	- name: Install python modules
	run: \|
	conda install pytest lxml tixi3 -c dlr-sc

	- name: Run pytest
	run: \|
	pytest

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