Fix 'xl.read.file' - it reads hidden sheets incorrectly. Thanks for reporting to Katie McCarron.
Add functions 'xl.sheet.show'/'xl.sheet.hide'/'xl.sheet.visible' to manage sheets visibility (very hidden sheet is not supported)
Add argument 'write.res.password' for xl.workbook.open/xl.workbook.save/xl.read.file/xl.save.file for reading/writing Excel files with second password (issue #11)
Add new function: xl.sheet.name - for getting/setting active sheet name
Add new function: xl.sheet.duplicate (issue #14)
Now in R_Connection_Examples.xlsm we use default version of R, not 32-bit version (issue #13)