0.9.1

• Docs search now finds nested entries (thanks @adlerhsieh)
• Many corrections and changes to the formatter, for better consistency and less obtrusion.
• Added OpenSSL::Cipher and OpenSSL::Digest (thanks @benoist)
• Added Char#+(String) (thanks @hangyas)
• Added Hash#key and Hash#key? (thanks @adlerhsieh)
• Added Time::Span#* and Time::Span#/ (thanks @jbaum98)
• Added Slice#reverse_each (thanks @omninonsense)
• Added docs for Random and Tempfile (thanks @adlerhsieh)
• Fixed some bugs.