BREAKING CHANGE: Implementing changes from PR #89 (#103)

- xRDSessionCollection
  - SessionHost supports array
  - Collections are now tested for SessionHosts as well, list of session hosts is amended
- xRDSessionDeployment
  - SessionHost and WebAccessServer supports array
  - Deployments are now tested for WebAccess and SessionHosts as well
  - Resource can extend an existing deployment with more session hosts and web access servers
  - ConnectionBroker is only remaining key since the broker can only broker one deployment

xRDSessionCollection: Fix Issues #105 and #106 (#109)

Adding new examples for the DSC resources in this module (#74)

Merge pull request #88 from jeremyciak/remoteapp_user_groups

xRDRemoteApp: Allow for multiple values with UserGroups parameter

Updating ChangeLog since v2.0.0 +semver:skip (#86)

Merge pull request #85 from danielboth/fix-changelog-filename

Fix changelog filename

Merge pull request #85 from danielboth/fix-changelog-filename

Fix changelog filename

Merge pull request #83 from jeremyciak/master

xRDSessionCollectionConfiguration: Change to use Test-DscParameterState from DscResource.Common

Merge pull request #81 from danielboth/required-modules-pin-pester-v4

Pin Pester to v4

Merge pull request #75 from danielboth/add-xRDCertificate-resource

xRDCertificateConfiguration: New resource to enable certificate management