Build scripts for building Debian packages, changes in versioning

Debian packages can be build:

 - on a Debian, Ubuntu systems for the current architecture (i386, amd64)
   with command `make build-debian-package`

 - on any system with VirtualBox and Vagrant (http://www.vagrantup.com)
   installed, with command `make build-releases`
   It is quite slow.  It might be a good way of buidling releases though.

Versioning change.  Before this, version of the game was calculated
authomatically as number of git commits since commit 8287b98.  Now the version
should be specified manually in the Makefile.

current state
Correct unit tests for installed game
Remove old Visual Studio 2012 solution