Establish Travis CI process for Admin-UI

This patch includes the following changes to establish the travis CI process:

1. Add a .travis.yml configuration file for admin-ui project
2. Change some of the rspec test cases' code to fit travis system, the changes
are included in the spec/integration/web/admin_spec.rb & spec/integration/web/user_spec.rb
& spec/integration/cc_spec.rb
3. Adjust selenium-webdriver gem version to 2.39.0 to fit the travis system.
Establish Travis-CI process for Admin-UI

Changed some of the selenium test codes so that when the timeout error happens,
there will be more information provided by the rspec tests.
Merge pull request #7 from xingzhou/establish-travis-ci

Establish Travis CI process for Admin-UI