update TODO.md
added rspec and guard
ran [1m[37m      invoke[0m  active_record
initialized guard
first db:migrate
ran [1m[34m   identical[0m  .rspec
[1m[34m       exist[0m  spec
[1m[34m   identical[0m  spec/spec_helper.rb (guard was not running)
delete index, default route to posts