Reduce file size

Begeta atomic css library already released version 1.0

Main change

• Reducing file begeta.min.css & begeta.css size (solved issue #59).

Fixes and changes

• Remove class width type pixel and calc.
• Remove class height type pixel and calc.
• Remove class min-width type pixel and calc.
• Remove class min-height type pixel and calc.
• Remove class max-width type pixel and calc.
• Remove class max-height type pixel and calc.
• Remove class flex-basis.
• Remove responsive breakpoint widescreen.
• Remove responsive breakpoint desktop-only.