cleanup gemspec, add dependencies
Merge pull request #6 from tarragon/gemspec

cleanup gemspec, add dependencies
switch to rspec. make leaderboard a module of trueachievements
Merge pull request #7 from tarragon/rspec

switch to rspec. make leaderboard a module of trueachievements
Merge branch 'master' into milestones

Conflicts:
	lib/trueachievements.rb
	lib/trueachievements/leaderboard.rb
	test/test_trueachievements_leaderboard.rb