Updated Release: NPOI 2.1.3.1

Encryption Support for Excel (HSSF and XSSF)
http://poi.apache.org/encryption.html
CellFormat samples
http://poi.apache.org/apidocs/org/apache/poi/ss/format/CellFormat.html

POI BUG FIXES
55729 - DataFormatter should format Error cells, returning the Excel error string
49237 - HSSF Row Style XfIndex is 12 not 16 bits of data
54607 - NullPointerException in XSSFSheet.getTopRow() when the top row is 1
55745 - fix handling of tables in XSSF if there are comments as well