Kawkab Mono 0.501

This release also includes v0.500.

• Updated copyright notice.
• Font is now paired with Source Code Pro instead of PT Mono. Source Code Pro makes available its Masters files so this allows us to precisely choose and interpolate the most suitable weight for pairing non-Arabic glyphs with Arabic ones.
• Font is available in 3 weights: Light, Regular and Bold.
• Previous Regular weight is now reclassified as Bold.
• Improved س and ص glyphs.
• Various outline improvements to several other glyphs.
• Added release-notes.md

Kawkab Mono 0.101

Post-initial release of Kawkab Mono. Includes proper license information.