renamed to :if_obstructed, :save, :close_if_unsaved
Readme.rdoc: comments, removed sp
Readme.rdoc: comments
ExcelApp comments
examples: include instead of module
examples: tried with spec_helper
save with :overwrite  if book is open in new appl. workaround
open: option :excel_app
:excel_app test in excel_app_spec
:excel_app test in book_spec.rb
application examples
renamed examples