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.
Fix quote docs

Closes #1949.
Handle unary ops when converting typespec to ast
Make sure IEx r helper does not return a record

The tuple r/1 returns can be a record and IEx will try to inspect it.
Tag the tuple so it will be inspected as a tuple.
fix typo in URI docs

URI.decode_query returns a `HashDict`
Merge pull request #1955 from ma2gedev/fix_uri_docs

fix typo in URI docs
fix bug in code sample for Stream.resource
Merge pull request #1956 from diogovk/master

fix bug in code sample for Stream.resource
Remove unneeded assert in assert_raise
Merge pull request #1958 from mururu/rm-unneeded-assert

Remove unneeded assert in assert_raise