oops! forgot traceur.
update debug@2.0.0 and move it to devDependencies.

if you haven't debug. just return a noop function.
add test for debug

ensure it is a noop function when debug no installed.
sed replace fullpaths in mocha html cov output.
Merge branch 'master' into gh-pages

* master:
  add test for debug
  update debug@2.0.0 and move it to devDependencies.
  oops! forgot traceur.
filter mocha html cov fullpaths