Assist #2. Add site-title fallback if logo is not set
Assist #2. Add logo fonts to the customiser for site title
Assist #2. Swap default logo.png
Assist #2. Increase default site-title font size
Assist #2. Add logo.png
Fix #2. Update site logo and title

Add google fonts, base logo and title customizer settings.

- Add Monserrat default for site title
- Add drop shadow
- Add customiser color control for site title