Add Icons, fix CSS and update Reademe.

Edit Readme

Add Icons, Add Aria Label to Icons.

Add 377 Icons. Update version to 4.2

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Add 62 Icons.

Update to v3, Deprecate Font

Added files via upload

A couple more Icons, Some Alias's, and CSS references for Octicons

Added 5 Icons, tidied up some CSS, added Simple Roadmap