Two new API's added for companies

[pramodshinde]

Added two new companies API's for

• Retrieving a List of companies user currently following
• Retrieving a List of companies suggested companies to follow

[hexgnu]

I think the API needs some cleanup.

#companies points to both suggested and companies that someone is following which to me violates a single responsibility. I'd rather see two methods for this like

def suggested_companies
  simple_query('/people/~/suggestions/to-follow/companies')
end

def followed_companies
  simple_query('/people/~/following/companies')
end

[pramodshinde]

Nice catch for :suggestions, cleaned up for single responsibility