Change User.make_key() to a static method
Implement AppTester.setup.user() task method
Add user fixture for AppTester
Implement AppTester.setup.user.lang()
Implement AppTester.setup.user.addr()
Implement AppTester.setup.user.answer() and AppTester.setup.user.answers()
Fix test description for AppTester.setup.user.addr()
Merge branch 'feature/issue-53-base-infrastructure-for-imtester-v02' into feature/issue-54-basic-apptester-setup-task-methods

Conflicts:
	lib/user.js
Implement AppTester.setup.user.state and AppTester.setup.user.state.metadata
AppTester setup tasks docstring fixes
Improve tests for AppTester.setup.user()
Implement AppTester.setup.config()
AppTester.setup.config() test description fixes
Implement AppTester.setup.kv()
Basic interaction task validation
Remove unused Extendable reference in lib/tester/setups module
Document and stub out AppTester's interaction task methods
Fixtures for AppTester interaction tasks
Stub out AppTester interaction task tests
Merge branch 'feature/issue-36-initial-changes-for-v02' into feature/issue-55-basic-apptester-interaction-task-methods