Added linkedin oauth gem, integrated oauth with devise, store user token in db
Added JSON gem to parse Web API response
Imported all basic data from LinkedIn, removed redundant JSON gem
Created new models and migrations for nested profile elements
Ensured that the right profile's timestamp is checked, which is not neccessarily the current user one's
Imported skills from LinkedIn, stored as kind of skill tags that enable easy matchmaking with company technologies
Imported current positions from LinkedIn
merge from master
Merge pull request #13 from natsteinmetz/linkedin

Added linkedin oauth and data imports, extended profile with nested models - in progress