Tests: improve concurrency checking for build consumers.
Dependencies: bump the version of notify-queue

The new version has filter-function support for the pop operation.
Cimpler: add repoMatcher argument to consumeBuild()

Allows consumers to filter the builds they recieve by a regex
on the repo string.
git-build: add repoRegex option to config

Allows filtering of which builds are built by which git-build plugin.
Allow multiple instances of plugins

If the plugin config is an array, Cimpler will call your plugin.init()
function once for each config object in the array.

Cimpler can now be used with more than one repo at a time.
Tests: Decrease timeout to speed up tests

Everything still seems to pass
Merge repoMatcher (#28) into master

Allow multiple repositories to be supported by one Cimpler

* Allow multiple instances of plugins
   * If the plugin config is an array, Cimpler will call your
     plugin.init() function once for each config object in the array.
* Add a repoRegex parameter option to consumeBuild
   * And thus also add it as a config option to git-build
     so it will pass it along.