Compressing manual && using `instal`

A new version of hr compressing the man page and using instal instead of cp in the installation.

Improved performance

• Improved performance by using printf instead of a loop, thanks @szepeviktor
• Moved manual file to a more standard place (/usr/local/share) thanks @smallwat3r

No more `env bash`, long live `/bin/bash`

The only change in this release is the shebang in the script itself.

Man page and Makefile

• Minor documentation updates
• Added man page
• Added Makefile
• Small but awesome code improvements

First stable release

hr works as documented in README file:

Transcribed examples:

$ hr
################################## # Till the end of your terminal window
$

$ hr '*'
********************************** # Till the end of your terminal window
$