Raising a NoMigrationReadError if no migration is read in migration loader.
Added updated_at hook, which stores last update.
added broken test to see where to go on
split snapshot and change files
added tests for functions of classes
added nested transaction code to snapshotable
made tests for snapshotting methods run
ignored local file
removed some \n in migration strings
made test commented with todo
now classes only snapshot the methods that are not in superclass.
removed test side effect of RootedBoot to Lecture test
split fast snapshot tests into different files
added fast tests for method snapshot
renamed snapshot tests
renamed requires
rearranged tests for method snapshotting
(class-)method snapshotting is tested
corrected spelling mistake
made some attr accessor tests run that broke because of the method test