Change get_verts() rounding

Now rounds the vert positions to 4 decimal places. Reduces data
required for storing the snapshots, but there was also floating
point errors when testing on my mac laptops after 5-8 decimal places
that were slightly different to other machines.

This level of accurary should be more than enough, as each vert
is being tested on 3 degrees of freedom.

.gitignore

@@ -7,4 +7,5 @@ logs/side-packages-install.log
 *.pyc
 .Rproj.user
 /.quarto/
-*egg*/*
+*egg*/*
+build/*

Makefile

@@ -1,3 +1,7 @@
 docs-build:
 	cd docs && quartodoc build
 	quarto render docs
+
+test:
+	pip3 install .
+	pytest -vv

tests/snapshots/test_load/test_local_pdb/1L58_verts.txt

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