reformated specs in rspec for 04 hashes symbols fixes #1
Merge pull request #13 from lewagon/minitest_to_rspec

reformated specs in rspec for 04 hashes symbols fixes #1
Fix specs again
fix spec
Fix spec
Forgot 2 must minitest syntax
Fix to_be_nil
First optional exercise for active record basics day
Add second exercise with dirty database
Need to set primary key as well
Reading material
Markdown links
some changes