Merge pull request #68 from fireweb/master

added additional task for myself
Fixed #69
Fixed #70
init 413
bundle binstubs rspec-core
add focus
add slow for excluding
add deferred_garbage_collection
add parallel_tests
add parallel
init
refactor features spec
change create to build
finish 413
update readme
Merge pull request #72 from fireweb/master

fast rails commands
Fixed #71
add authentication concern
add searchable and csv_conversion concern
add invitation concern
add password_resettable concern
add 414 batch api
add handle exception