* fpspreadsheet: cosmetic



git-svn-id: http://svn.code.sf.net/p/lazarus-ccr/svn@3616 8e941d3f-bd1b-0410-a28a-d453659cc2b4
+ fpspreadsheet: dbexport unit and tests. Initial version.

Possible future improvements:
* graphical component in export tab
* using virtual mode in case large datasets are exported



git-svn-id: http://svn.code.sf.net/p/lazarus-ccr/svn@3617 8e941d3f-bd1b-0410-a28a-d453659cc2b4