Improve docstring
Apply :file keyword
Use :region & :C-u keyword as default keyword of specific condition
Apply :C-u! Keyword that reset current-prefix-arg
Apply unbinding key feature if user set nil to args
Use old global-key-map's key if user satisfy predicate #7

When I use multiple-cursors.el with mykie, I can't use it correctly.
This commit is fixing the problem.
Move mykie.el to lisp directory
Add a new feature that show mykie keywords by helm(but WIP yet)
Load helm-mykie-keywords if user can load helm.el
Modify .ert-runner
mykie:set-keys : modify argument to use with-self-key without quote
Improve README.md