Fixed doc typos in Kernel and String
Release v0.12.0
Bump to v0.12.1-dev
Merge pull request #1938 from jwarwick/doc_typos

Fixed doc typos in Kernel and String
Run tests against erlang R16B03
Merge pull request #1940 from vanstee/travis-r16b03

Run tests against erlang R16B03
Revert "Merge pull request #1940 from vanstee/travis-r16b03"

Travis does not support R16B03 yet.
Add raw string compare in doctests for #Module<...>

Will now do raw string compare for doctests of #Module<...> format:

    iex> HashDict.new a: 0, b: 1, c: 2
    #HashDict<[a: 0, b: 1, c: 2]>