Fix up dependencies.

[ry5n]

Fix dependency setup and update devDependencies to match new Adaptive 2.x standards. Fixes #84

Status: Ready for review

Reviewers: (GitHub @s of all reviewers) Ticket: N/A Linked PRs: none

Changes

• Don’t commit bower_components (only project repos should commit this);
• Move bower.json from out of test/ to root, where it belongs;
• Remove unused dev deps (spline);
• Replace modularized-normalize-scss (devDependency) with mobify/level to match adaptivejs 2.0.

  How to test-drive this PR

• Check out this branch
• Run grunt (default task)
• Open test/index.html in a browser and verify everything looks the same as master

  Research resources

• none

  Feedback

• [ ] +1
• [ ] +1