Fix #491 projex dot-ignore add some missing items (#492)

Author: robnagler

pykern/package_data/projex/dot-gitignore.jinja

@@ -46,9 +46,12 @@ pip-delete-this-directory.txt
 htmlcov/
 .tox/
 .coverage
+.coverage.*
 .cache
 nosetests.xml
 coverage.xml
+*,cover
+.pytest_cache
 
 # Translations
 *.mo