Remove '=' from user input formula if exists
Load orignal sheetId
Add defineName support
Fix bug: workbook information doesn't load to document
Fix defineName bug

sheetId is used in application inside, when save to/load from xml file,
which will convert to/from localSheetId
Update .qdoc files
Fix documentation errors
Documentation: Add url link to source code page
Documentation: Use our html footer instead of the default one
Documentation: little update
Add more control option for worksheet
Add overload function for setRow and setColumn
Add a demo example