Add patched JetBrains Mono font for powerline

[jmigual]

This PR adds the JetBrains Mono font with patched glyphs for powerline. The following fonts have been included:

• JetBrainsMonoPowerline-BoldItalic.ttf
• JetBrainsMonoPowerline-Bold.ttf
• JetBrainsMonoPowerlineExtraBold-ExBdIt.ttf
• JetBrainsMonoPowerlineExtraBold-ExtBd.ttf
• JetBrainsMonoPowerline-Italic.ttf
• JetBrainsMonoPowerlineMedium-MedIta.ttf
• JetBrainsMonoPowerlineMedium-Medium.ttf
• JetBrainsMonoPowerline-Regular.ttf

The license is included (Apache License, Version 2.0)

[jmigual]

This fixes #336

[rubiin]

tried it doesnt work?

[jmigual]

tried it doesnt work?

I am going to close this, I recommend moving to Nerd Fonts that has more updated fonts