migrate to bundler

Conflicts:
	Rakefile
	lib/smoothsort.rb
	smoothsort.gemspec
More migrations

Conflicts:
	Rakefile
begin docs

Conflicts:
	ext/smoothsort/smoothsort.c
	lib/smoothsort.rb
Documentation

Conflicts:
	ext/smoothsort/smoothsort.c
	lib/smoothsort.rb
README update
README update
Gemfile.lock
satisfy @thenickperson
Update README.md