v0.2 - Custom Fonts and Metrics

This releases adds a few font related features as follows:

• Support for loading custom fonts from the channel zip package.
• Included Open Sans as the default device font.
• Finished roFontRegistry and roFont implementation by adding font metrics.
• Updated license information.

Included a new dependency to opentype.js package to parse font files.

The website https://lvcabral.com/brs/ is updated with this release, and you can also get the package below to run the emulator locally.