Doc updates:

  * Link to phantomjs API docs on phantomjs.com/api/
  * Update maven section of README.md to use new groupId in 1.2.0
    (com.github.detro)
Merge pull request #392 from dalvizu/master

Doc updates
Merge pull request #385 from HelioGuilherme66/master

Fixes a typo in Timeout error message at the "asynchronous" word.