HealthvaultException factory added.  AuthenticatedSessionTokenExpiredException is now an extension of HealthvaultException. Managing the reconection after token expire.
Merge remote-tracking branch 'origin/master' into pep
HealthvaultExceptionFactory and HealthvaultException refactor.
Added Personal Thing.
Created CredentialTokenExpiredException
Created Personal Proxy\Thing
Merge remote-tracking branch 'origin/pep'

Conflicts:
	src/DLS/Healthvault/Platform/PlatformMethod.php