Misc changes to help build cleanly.

It seems edoc is pretty picky about where one uses doctags. Fixed
it so that master builds without any compile-time warnings or
errors. Also changed rebar.config for better appeaance.
Merge pull request #81 from AxisOfEval/master

Misc changes to help build cleanly.
[#80] Fixed the run escript to not throw errors for make blog

We had an unused variable called Author3 which is now underscored.
Also lager expects goldrush to be running before it starts. So
fixed that as well.
Merge pull request #82 from AxisOfEval/master

[#80] Fixed the run escript to not throw errors for make blog
Some updates to README.md

It's not 100% fine, yet… but at least it contains no lies :P
Create CONTRIBUTORS.md
Fix for comment by @hernanrivasacosta

[this comment](https://github.com/inaka/sumo_db/pull/85#discussion_r19343863)
Fix for comment by @HernanRivasAcosta

[this comment](https://github.com/inaka/sumo_db/pull/85#discussion_r19343991)
Fix for comment by @HernanRivasAcosta

[this comment](https://github.com/inaka/sumo_db/pull/85#discussion_r19344053)
a period
Merge pull request #85 from inaka/elbrujohalcon.updated.readme

README + CONTRIBUTORS
Merge branch 'master' into igaray.80.fix_blog_example

Conflicts:
	examples/blog/run