v2.20.0 w/ multiple fixes enhancements for #115 and #117

[scrthq]

2.20.0

• Issue #115
  • Renamed: Get-GSCalendarEventList to Get-GSCalendarEvent and set the original name as an exported Alias to the new name for backwards compatibility.
  • Added: EventId parameter to Get-GSCalendarEvent to specify individual event ID's to get instead of a filtered list.
  • Added: PrivateExtendedProperty parameter to Get-GSCalendarEvent.
  • Added: SharedExtendedProperty parameter to Get-GSCalendarEvent.
  • Added: PrivateExtendedProperties parameter to New-GSCalendarEvent and Update-GSCalendarEvent.
  • Added: SharedExtendedProperties parameter to New-GSCalendarEvent and Update-GSCalendarEvent.
  • Added: ExtendedProperties parameter to New-GSCalendarEvent and Update-GSCalendarEvent.
  • Added: Id parameter to New-GSCalendarEvent and Update-GSCalendarEvent.
• Issue #117
  • Fixed: Type error on States parameter of Get-GSStudentGuardianInvitation.
• Miscellaneous
  • Updated Contributing doc with new Build script steps
  • Removed DebugMode.ps1 script since it's no longer needed (use build.ps1 instead)