remove rubyzip gem from Gemfile, add rubyzip gem version lock 0.9.9
remove mock garbage
remove Serializer, package itself is responsible for serialization, make tests green
remove test.docx
change gemspec description
change Package#to_stream to return StringIO, tests
add implementation for attributes processing in exist_xpath rspec matcher (only ideas, not tested, commented for now)
default template bug fixes, content_builder tests
total refactoring, remove minimal template
bug & test fixes, tests red
finish work on styling & better dsl, tests green
ContentBuilder bug fix