Switch to yard instead of rdoc
Consistent, simple file naming
Updates to README

  * Add link to CHANGELOG in README
  * Update examples link. Relates to #204
  * JSON API is now being used, so remove TODO
  * Add section in README about documentation
Document all query and update methods
Document Exceptions, Search, and Mash
Re-organize modules under Api namespace

Match organization in LinkedIn's REST API Documentation: http://developer.linkedin.com/rest
Review and edit documentation
Use consistent and revealing arugment names

Clarify #add_job_bookmark argument and set convention of using 'update_key' as the argument name
Add method for Finding New Connections
Convert examples to markdown pages