travis: convert script to sequence of one elt
Travis: add env matrix to run multiple tests
travis: add before_script stanza
Travis: explicit full paths from env matrix
set bundle --system
set gem --bindir
better group before_install vs install stanzas
add informational feedback during before_install
comments/whitespace
Merge pull request #4735 from rolandwalker/travis_multi_ruby

Travis multi-Ruby support