Merge branch 'complex-attribute-leaderboard-fix' into opower-master-1-0-3-opower-1

* complex-attribute-leaderboard-fix:
  Adds :selector/:adjustment to COMPLEX_ATTRIBUTES for Group, Leaderboard, and Definition.
  Fixes #10 - Revised BaseResource#load to handle decoding newly added complex attributes on BadgevilleBerlin::Player.  Constrained activeresource versions to ~>3.1 (>= 3.1.0, < 4.0.0.) Incremented gem version to 1.0.2.
  [BV-287] Added test to readme_use_case_spec.rb and updated README to show how to find a player by email.

Conflicts:
	lib/badgeville_berlin/base_resource.rb
	lib/badgeville_berlin/version.rb