added assignment rspec tests
Merge branch 'master' of git://github.com/MarkUsProject/Markus
houndci commit: changed to use ruby1.9 hash syntax
houndci commit: removed extra blank line
typo in an example string
houndci fix: accidentally added random space.
replaced day method with days to be consistent
removed migrated tests from rake tests
Merge pull request #1842 from kubasub/master

Added Assignment model, rspec tests