Delete needless functions
't -> t
Apply :C-u*X keyword(X is C-u's pushed times)
funcname -> state
mykie:current-funcname -> mykie:current-state
Delete needless package loading
Improve README.md for version 0.0.5
Move mykie:kill-or-copy-region to mykie:region-init
Modify version 0.0.4 -> 0.0.5