Correctly occupies the cell a unit is on when creating it. Fixes #8
Fixed Ubuntu install instructions
Fixed markdown of Ubuntu compiling instructions
Merge pull request #9 from pdl/master

Thanks for your contribution for making it work on ubuntu (again). Great to see someone testing it. And to see it takes little effort to get it working.
Merge branch 'master' into feature/explore-by-clearing-shroud

Conflicts:
	unit.cpp