msdfgl 0.2

Changes:

• Fixed noise from the atlas texture
• Moved all printf-commands behind one API call
• Bugfixes, error handling improvements and cleanup
• Support using the same texture with multiple fonts
• Static library on Linux/macOS
• Render only one "empty box" for control characters.

Known issues:

• No support for cubic segments yet
• Color mapping for certain shapes is incomplete
• Rendering calls use a geomety shader
• Small errors in shapes, such as letters q and k with LiberationSerif-Regular.ttf. Visible only with a really large font size.
• DLL build on windows not working