Merge pull request #47 from ericbmerritt/master

fix various issues in ci and dialyzer
fix includings of headers
Merge pull request #48 from tsloughter/master

fix includings of headers for erldocs
Add R16Bx and 17.0-rc1 to .travis.yml
Make erlware_commons be compatible with Erlang 17.0-rc1
Merge pull request #50 from kiela/master

Make erlware_commons be compatible with Erlang 17.0-rc1
Allow overriding rebar location.
Merge pull request #51 from rlipscombe/rl-rebar-var

Allow overriding rebar location.