Fix verisons of gulp-util and chai in order not to break tests for this time.
Fix stream error issue.
Create test expected fixture files on the fly.
LICENSE happened to be executable somehow.
Approximate versions for dependencies.
Pull back gulp-util's version.
Drop support for Node 0.8.
Merge pull request #30 from shuhei/handle-bundle-error

Handle stream error from browserify & Create test fixtures on the fly