refactored automigration tests into new folder
rake migrate:up now creates a snapshot
removed error of side-effect:( that BaseLecture2 and BaseLecture1 were accidentially deleted in the snapshot tests
made a copy automigration from project2
refactored: split automigration show test into two parts
refactored the rake task into Migration class
added test for auto migration file creation
made tests for rake migrate:auto run
fixed typo -> tests run