Optimization :shipit:
Optimization :shipit:

Process creation is very exprensive operation for Windows. Replacing all
process creation with zsh built-in functions.

References:
  http://tim.vanwerkhoven.org/post/2012/10/28/ZSH/Bash-string-manipulation
  http://stackoverflow.com/a/3352015
  http://stackoverflow.com/a/2930519

simnalamburt/pkg-cgitc