Adding buffer lib and tests
Updated README to add buffer section
Updated buffer inclusion to follow new language/hoek implementation
Add min/max/length rules for buffers
Merge https://github.com/spumko/joi
Merge https://github.com/spumko/joi
Updated to latest master. Swapped buffer type to binary type. Updated README
Merge pull request #226 from petreboy14/master

Add support for binary type