[CORD-1806] Document XOS internals

Change-Id: I8540c1063b543078be2d5f5430ca3eaa048a423a
diff --git a/.gitignore b/.gitignore
index 8c5ce73..2b7bf1a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -34,3 +34,11 @@
 venv-xos/
 _book/
 .noseids
+
+lib/xos-config/cover/
+lib/xos-config/.coverage
+lib/xos-config/coverage.xml
+
+lib/xos-genx/cover/
+lib/xos-genx/.coverage
+lib/xos-genx/coverage.xml
\ No newline at end of file