• Fixed credential authorization
• Added token authorization workaround because UM's APIs do not conform to RFC 6750
• Made ServiceManager's delegate strong because Swift currently throws EXC_BAD_ACCESS errors for some weak references
• Fixed getPerson bug introduced in last commit
• Added a base test case that shows authentication and API access is working correctly
• Fixed a token expiration timer bug that would occur when the code was not running in an application (e.g. in a test)