Clarify install instructions
Merge pull request #1387 from adrientetar/patch-doc

Clarify install instructions & contributing guidelines
Add SVG xmlns attributes. Fixes #626.

Apparently Chrome doesn't treat it as a webfont if it's not there.
Merge pull request #1392 from JoesCat/homebrew_and_1366

Homebrew and issue#1366
Merge pull request #1393 from jtanx/svg-header

Add SVG xmlns attributes. Fixes #626.