Update copyright
Update rebar (d2321d6)
Remove explicit configuration for deps_dir
Update rebar (59a20a7)
Update rebar (2.0.0-118-g2d62896)
Cleanup and simplify rebar and repo tool usage
Update rebar (2.0.0-208-g32e67ef)
Update rebar (2.1.0-pre-4-gbf35ec9)
Add Makefile for automating and documenting common recipes
Fix broken links
Update documentation
Generate edocs via asciiedoc
Fix broken links
Prevent edown from converting external .html links to .md links

This is a work-around for edown issue #21
(https://github.com/esl/edown/issues/21).
Update rebar (2.1.0-pre-24-g5079bd5)
Merge branch 'upstream-master' into dev