Octicons

Adds:

- Keywords.json file that has an index of all octicons with alias names

Fixes:

- Putting the `$octicons-font-path` back in the scss file.

Adds:

- Installation docs https://github.com/primer/octicons/pull/94
- `grabber`
- `plus-small`

Modifies:

- `smiley`

Refines:

- Renames `mail-reply` to `reply` and refines its shape.

Fixes:

- Revert license back to SPDX standard

Adds:

- Whole new grunt build system including svg sprite sheet.
- adding css min https://github.com/primer/octicons/pull/60
- adding woff2 format https://github.com/primer/octicons/issues/3
- creates spritesheet of svg files https://github.com/primer/octicons/issues/88

Removes:

- Bower support

Fixes:

- all svg icons include viewBox https://github.com/primer/octicons/issues/87
- license in package.json https://github.com/primer/octicons/issues/85

Adds:

- `unverified`

Refines:

- `verified`

This includes various SVG viewport refinements.

Refines:

- `thumbs-down`
- `logo-github`