[SOGo] connector and free busy and rfc2739.schema for free busy

[Robert Stanford]

Running the Thunderbird Error Console returns:

Error: this.eventNameTextbox has no properties
Source File: chrome://calendar/content/calendar-view-core.xml
Line: 270

Error: aItem.calendar has no properties
Source File: chrome://calendar/content/calendar-item-editing.js
Line: 389

Error: attendees has no properties
Source File: 
chrome://sogo-connector/content/calendar/calendar-event-dialog.js
Line: 7

Warning: anonymous function does not always return a value
Source File: chrome://inverse-library/content/simpleLdapQuery.js
Line: 255, Column: 1
Source Code:
    }

Error: this.inverseParentAutocompleteOverride is not a function
Source File: 
chrome://sogo-connector/content/calendar/calendar-event-dialog-attendees.xml
Line: 30

Error: [Exception... "Not enough arguments"  nsresult: "0x80570001 
(NS_ERROR_XPC_NOT_ENOUGH_ARGS)"  location: "JS frame :: 
chrome://sogo-connector/content/calendar/sogoFBRequest.js :: anonymous 
:: line 22"  data: no]
Source File: chrome://sogo-connector/content/calendar/sogoFBRequest.js
Line: 22