These are:
- Histogram and circle-plotting tests: these have inconsistent round-off
behavior on different arches; specifically 32-bit and 64-bit x86. So both
plots look fine, but not identical, thus the tests fail
- Streaming tests. These tests have a temporal component, so the loading of
the host machine can cause a test failure. It's fine pretty much all the
time on my not-too-new laptop, but this is bad for automated testing
The RUN_ALL_TESTS environment variable can be set to turn all ALL tests
This is required for the streaming tests I'm about to write. Test::Script::Run
doesn't know how to feed input from one process to another as the data comes in
