Branch: master

      1) Defined relationships for creating Mentor-Mentee links in database.
      2) Added partial implementation for sending Mquest as Mentor or Mquest as Mentee from
         logged in user's Mquests page.

============= Added (16)

      /db/migrate/20130104055603_create_mentor_mentee_connections.rb
      /app/models/mentor_mentee_connection.rb
        - MentorMentee is the name of the project so Rails restricts generation
          of model having this name.Thus suffixed the name with 'connection'.
      /test/unit/mentor_mentee_connection_test.rb
      /test/fixtures/mentor_mentee_connections.yml

      /db/migrate/20130104071426_create_mquests.rb
      /app/models/mquest.rb
      /test/unit/mquest_test.rb
      /test/fixtures/mquests.yml

      /lib/mentor_mentee_helpers/general.rb

      /app/mailers/user_mailer.rb
      /app/views/user_mailer/mquest_email.html.haml

      /app/controllers/mquests_controller.rb
      /app/views/mquests (folder)
      /app/views/mquests/index.html.haml
      /test/functional/mquests_controller_test.rb
      /app/helpers/mquests_helper.rb
      /test/unit/helpers/mquests_helper_test.rb

============= Updated (6)
      /db/schema.rb
         - Added tables:
              MENTOR_MENTEE_CONNECTIONS
              MQUESTS

      /app/models/user.rb
        - Added following relations:
            has_many :mentor_connections, class_name: 'MentorMenteeConnection', foreign_key: 'mentor_id', dependent: :destroy
            has_many :mentors, through: :mentor_connections, source: :mentor

            has_many :mentee_connections, class_name: 'MentorMenteeConnection', foreign_key: 'mentee_id', dependent: :destroy
            has_many :mentees, through: :mentee_connections, source: :mentee

      /config/application.rb
        - Enabled following:
            config.autoload_paths << "#{config.root}/lib/**"

      /config/locales/en.yml
        - Added
            mails:
              mquest:
                subject: "Request for being a %{role} from Mentor-Mentee networking platform"

            mquests:
              errors:
                could_not_mquest: "Could not mquest.Either or all of the required details [role, mentee, mentor] found missing."

              no_users_available: "No users available in the system, except you!."
              mquest_link_title: "Mquest"
              as_mentor: "As Mentor"
              as_mentee: "As Mentee"

      /config/routes.rb
        - Added
            match "/users/:mentor_id/mquest/:mentee_id/:role" => "users#mquest", via: :get, as: :mquest_as_mentor
            match "/users/:mentee_id/mquest/:mentor_id/:role" => "users#mquest", via: :get, as: :mquest_as_mentee

         - Added
             resources :mquests
           as nested resource for users.

      /app/views/layouts/_top_navigation.html.haml
        - Enabled "Mquests" link.