Separate each file in milk.coffee by file name
Tweak exception messages in are_equal()
Allow usage of keywords as own methods
Fix range bug in insert_at() and insert_many_at()
Fix method/keyword is_boolean()
Tweak first(), last(), add rest() to String
Add mix & merge keywords
Fix frozen_copy_of()
Multiple changes
Return error code 1 when tests fail
Add Travis YAML file
Add Travis status image in readme