Patch form Aleksey Lagunov implementing:
 1. In frReport added property BeforePrintScript - script executable before generating the report. 
 2. Added to designer "File" menu an editor for the BeforePrintScript property. 
 3. In the example report_url added an example for BeforePrintScript. 
 4. Process LazReport variables in Tags of all TMemoView objects before creating a report.
 

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40812 4005530d-fff6-0310-9dd1-cebe43e6787f