ZSS-818 Formula not update outside the preload rows
ZSS-814 Provide a new APIs which can enforce evaluation and refresh the specified range.
update release file for ZSSPOI
ZSS-816 Performance impact when protect sheet with allowSelectingUnlockedCells set to true
Refix ZSS-816: Should handle column/row unlock but cell locked case.
ZSS-777 Display currency symbol of different countries
ZSS-663 Spreadsheet: jump to first/last sheet
Merge pull request #61 from jerrywell/zss663

ZSS-663 Spreadsheet: jump to first/last sheet
ZSS-811 Exception when export a cell with special formula
ZSS-812 NPE when evaluate a special formula
ZSS-829 export pdf cause exception: the region is illegal A47:H48[47,0,46,7]
ZSS-821 missing chart title after importing a chart
update version number for build.
update theme jar file.
ZSS-822 The scale of y axis is different after importing a chart
Merge branch '3.6' of github.com:zkoss/zkspreadsheet into 3.6
improve style for sheet tab menu.
ZSS-832 Support hide sheet
Merge branch '3.6' of github.com:zkoss/zkspreadsheet into 3.6
Refix ZSS-818. Reuse Evaluator's internal cache. It is faster.