removed get/set speed functions
Carp on use of get|set_speed about ensuing removal
Update generated travis.yml to address CI failures

There's a new version of the Dist::Zilla::Plugin::TravisYML dzil plugin
- we're hoping it speeds up our CI runs and gets them passing
again. Most of the CI runs were actually failing while trying to install
Dist::Zilla and its dependencies, and not even making it to S::R::D's
tests, which was frustrating.
Try out some Travis options to avoid unnecessary tests
Try out fixes in 3c8e91f against all perl versions
Limit perl versions that are run on Travis
Cleanup whitespace in 01-driver.t