1. Changed the default value of options.plugin back to '' so that plugins can be automatically picked.
2. Removed unsafe eval since it seems it is not necessary
added travis-ci
tring to fix travis file not found error
remove node version 0.6 from .travis.yml
remove node v0.11 in travis.yml
changed remote urls in test to local urls so that the test result is more stable
Merge branch 'ci'

Conflicts:
	plugins/default.js