Make rake spec running

While the first time trying to run `rake spec` , I got issue in Gemfile.lock as well as  bundler gem path, I submit those two patch in order to avoid more people got the same problem.

```
RubyGems Environment:
  - RUBYGEMS VERSION: 1.8.23
  - RUBY VERSION: 1.9.3 (2013-05-15 patchlevel 429) [x86_64-darwin13.4.0]
  - INSTALLATION DIRECTORY: /Users/wtie/.rvm/gems/ruby-1.9.3-p429
  - RUBY EXECUTABLE: /Users/wtie/.rvm/rubies/ruby-1.9.3-p429/bin/ruby
  - EXECUTABLE DIRECTORY: /Users/wtie/.rvm/gems/ruby-1.9.3-p429/bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86_64-darwin-13
  - GEM PATHS:
     - /Users/wtie/.rvm/gems/ruby-1.9.3-p429
     - /Users/wtie/.rvm/gems/ruby-1.9.3-p429@global
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :benchmark => false
     - :backtrace => false
     - :bulk_threshold => 1000
     - :sources => ["http://ruby.taobao.org/", "http://rubygems.org/"]
     - "install" => "--no-rdoc --no-ri"
     - "update" => "--no-rdoc --no-ri"
  - REMOTE SOURCES:
     - http://rubygems.org/
```