Update testing basics doc on runnings tests without warnings. Add simple helper tool.
Merge pull request #1490 from willingc/test-warning

Update testing basics doc and add helper tool to run tests without warnings
Fix minor formatting error in testing basics doc
Merge pull request #1491 from willingc/doc-typo

Fix minor formatting error in testing basics doc
De-twill project tests

Part of an ongoing de-twilling process. More related commits to follow.
Merge pull request #1493 from onceuponatimeforever/detwill

De-twill project tests