added content to readme
added content to readme

mezza/rubyXL,99cm/rubyXL,99cm/rubyXL,ThijsWouters/rubyXL,ryanmark/rubyXL,99cm/rubyXL,parallel588/rubyXL,ryanmark/rubyXL,weshatheleopard/rubyXL,weshatheleopard/rubyXL,weshatheleopard/rubyXL,mezza/rubyXL,ryanmark/rubyXL,parallel588/rubyXL,mezza/rubyXL,ThijsWouters/rubyXL,parallel588/rubyXL