emptyStr default value
fix warning where multiple TRUE/FALSE sharestrings indices
first implementation of writeData2
Functionality to automatically style
data of class "currency" and "accounting"
removed check for zip application that never did anything.
Documentation fixes
Merge pull request #2 from lbraglia/writeData2

An implementation of writeData as generic
removed modification to "scipen". Conversion of rownumbers from numeric to integer will prevent scientific notation.
Creation of NEWS file
Changed incorrect class(wb) to class(style)