Remove warnings "assigned but unused variable"
Remove warnings "instance variable @{ivar} not initialized"
Remove warnings "`*' interpreted as argument prefix"
Remove warnings "method redefined; discarding old default_format"
spreadsheet-0.7.6.gem released
Add a Gemfile
Finish with bundler
Hoe in dev deps
RuntimeError when file is empty
Readme updated
Make tests pass
spreadsheet-0.7.7.gem released
Updated spreadsheet.gemspec with correct version
added test/excel/writer/n_worksheet.rb - this was somehow missing.