Introduce Inter font

Also adds README. Bump gem to v0.0.10

Author: martin-brennan

Diff for: README.md

@@ -0,0 +1,23 @@
+## Discourse Fonts
+
+This gem is used to distribute all fonts used for the [Discourse forum software](https://discourse.org/). The main repository for Discourse is [https://github.com/discourse/discourse](https://github.com/discourse/discourse).
+
+This gem can be found on RubyGems at [https://rubygems.org/gems/discourse-fonts](https://rubygems.org/gems/discourse-fonts).
+
+### Adding fonts
+
+Most fonts in this gem are from Google Fonts. When adding a new font, this is the process:
+
+1. Download the font from Google Fonts
+1. Make sure the license is added to a text file in vendor/assets/fonts. Sometimes the license will already be present, e.g. OFL is a common license.
+1. Copy the downlowded .ttf files to vendor/assets/fonts
+1. Add the font name, stack, and variants for e.g. different weights to lib/discourse_fonts.rb following the existing examples
+1. Bump the VERSION in this file
+
+To test this gem out locally, you can change the discourse/discourse gemfile to point to your local copy of this gem using the `path` option:
+
+```
+gem 'discourse-fonts', path: '/path/to/discourse-fonts'
+```
+
+Discourse symlinks the fonts in vendor/assets/fonts to the public/fonts directory, and it should update this symlink when you install the gem from the local path.