Ensure var is set
Add function GetRoomLists
Fix typo
Set value of CURLOPT_SSL_VERIFYHOST to 2, support for value 1 (true) removed in cURL 7.28.1
Add var $verifyhost (default value 2) and function to set $verifyhost
Add const Exchange2010_SP3, Exchange2013 and Exchange2013_SP1
RequestServerVersion for Exchange 2010 SP3 is Exchange2010_SP2

See http://msdn.microsoft.com/en-us/library/office/bb891876(v=exchg.150).aspx
Merge remote-tracking branch 'slackero/issue-86-missing-types'