new 0.5.7 release of xlsx package

[Adrian Dragulescu]

A minor release, just taking care of some bugs. 

I will upload it to CRAN shortly.  In the meantime, you can get it from https://code.google.com/p/rexcel/

Cheers, 

Adrian

Changes in version 0.5.7 (released 2014-08-01)

 o Fixed issue 41.  There was a bug in the '+' method for CellStyle

 that was triggered when Font + Fill was not working properly. 

 o Added a new function called setRowHeight (wish of Sven Neulinger).

 See issue 43. 

 o Function write.xlsx did not check properly for POSIXct column

 classes and this resulted in spreadsheets not properly formatted.

 See issue 45. 

 o Added a new function addAutoFilter to set a filter on a sheet.