Updated library to work with X-Total-Count header and new GetApplications endpoint

[mjschuetze102]

New Features:

• Added additional app management service endpoint
  • GetApplications - Get a paginated list of applications

Updates:

• Added includeTotalCount parameter to several endpoints to allow for getting a count of matching resources for the provided filter
  • GetApplications
  • GetCourses
  • GetDispatches
  • GetDestinations
  • GetDestinationDispatches
  • GetAllInvitations
  • GetPublicInvitations
  • GetPublicUserInvitations
  • GetPrivateInvitations
  • GetPrivateUserInvitations
  • GetRegistrations
  • GetXapiCredentials
• Updated Jackson version requirement

Removals/ Deprecations:

• Removed Unsecured auth type in favor of supplying no auth
  • This type was originally added for jumping through some hoops internally to represent no authentication. This has been remedied and is no longer required
• Deprecated GetApplicationList in favor of GetApplications
  • The new endpoint provides additional values that were not previously available due to performance concerns with adding them to the old endpoint