Adding documentation on FMFindQuery()

Added documentation to FXFunctions.rtf and FXFunctions.pdf on how to use
FMFindQuery() with fxphp (English Only).
Fixed error in sample code for FMFindQuery

Fixed error in sample code for FMFindQuery in FXFunctions.rtf and
FXFunctions.pdf
Merge pull request #23 from tcfitzgerald/master

Added documentation on FMFindQuery()
Fix compatibility with FileMaker Server 13
Merge pull request #24 from matsuo/support-fms13

Fix compatibility with FileMaker Server 13