added Gemfile
added s.executables and s.require_paths to gemspec; updated description
added .txt extension to LICENSE file
added .rvmrc to .gitignore
versioning via version.rb
added executable (cli)
added add_runtime_dependency attributes to gemspec
converted indentation from 2-space soft-tabs to hard-tabs
moved resembles_base64? to private
folded assemble into initialize; refactored
folded useless variable
render methods returning 0; tests updated
added spaces for consistency
updated README re: cli
version bump
added rake tasks: gem build and gem release