Merge branch 'Jack' into 'master'

.gitlab-ci.yml

AmpScan/align.py

AmpScan/core.py

AmpScan/registration.py

AmpScan/smooth.py

AmpScan/ssm.py

AmpScan/trim.py

GUIs/AmpScanGUI.py

tests/__init__py.py

tests/ascii_examples/sample_stl_sphere_ASCII.stl

tests/core_tests.py

tests/pca_tests/stl_file_3.stl

tests/sample_test.py

tests/stl_file.stl

tests/stl_file_2.stl

tests/stl_file_3.stl

tests/test_basics.py

tests/test_core.py

tests/test_smoothing.py

tests/test_trim.py