Updated rake to 10.2.0
Added missing # encoding: UTF-8
Unit test of auth command
Removing json in favor of multi_json
Removing json
Merge remote-tracking branch 'upstream/multi_json' into refactor

Conflicts:
	lib/gooddata/commands/auth.rb
	lib/gooddata/commands/projects.rb
	lib/gooddata/connection.rb
	lib/gooddata/models/dashboard.rb
Wrap hacks into custom file for easier refactor