Fix compatibility with FileMaker Server 12 (returns an error with version 12 if the XML query string contains "-recid.op=eq")
Fix checking if mbstring is enabled or not in RetrieveFM7VerboseData.class.php
Merge pull request #21 from matsuo/fix-checking-mbstring

Fix checking if mbstring is enabled or not in RetrieveFM7VerboseData.class.php
Merge pull request #20 from matsuo/fixCompatFMS12RecID

Fix compatibility with FileMaker Server 12 (deprecated "-recid.op=eq")