Reference: https://stackoverflow.com/a/11651184/2911458

- was: hand-rolling a version of Trackler based of master and then
  applying changes from the PR/commit/local change to that trackler gem.
- now: using the exact tagged version of Trackler as the basis for the
  hand-rolled gem.

This fixes the issue where a change make to Trackler's master is
incompatible with the current version of x-api.  In short, we were
building the Trackler gem wrong.

+ bookstore: add missing import statement in tests

Track data has been factored into a separate gem: trackler.  The build
was breaking.
  (see also exercism/x-api#141)

- in journey test, remove @Ignores so that test runs exercise all tests.
- increase the verbosity of test logging to aide in seeing progress as
  tests are un@Ignored and solved.
- saving scripts used to make changes to all exercises.  These are the
  start of a library of scripts making such changes easier.
- make Gradle output more CI-friendly.