Design pass (#8)

* first stab at bullet points
* setup theming, custom opacities, use of brand UI colors
* color key change
* delete brand
* setup initial defaults
* Add opacity parameter to primary color
* style TOC
* styling pass header, footer, hints, toc, trademark
* table pass
* style pass, typo, quote, tabs, search, theme, toc

.env.example

@@ -1,6 +1,6 @@
 # Mode to serve only a single space
 # Ex: http://localhost:4000
-GITBOOK_MODE=single
+# GITBOOK_MODE=single
 GITBOOK_SPACE_ID=your_space_id
 GITBOOK_TOKEN=your_token_here
 
@@ -10,7 +10,7 @@ GITBOOK_MODE=multi
 
 # Mode to serve multiple spaces with the space url passed as a path
 # Ex: http://localhost:4000/docs.mycompany.com/page1
-GITBOOK_MODE=multi-path
+# GITBOOK_MODE=multi-path
 
 # Other options: