Fixed codeforces.ru unit-test.

Had to make test to work in asyncronous way.  Note `done` parameter passed
to Mocha test.  This is a callback that should be called once async test
finishes.
Add Vagrantfile.

Provision (installing required software on the clean VM) is not finished yet.
added github json for tests
Merge branch 'master' of https://github.com/asivokon/mooch-sentinel