Option to use local font files instead of Google fonts, combined option for CDN use (#16)

* option to use local font files instead of GoogleFonts, combined config for CDN use

* set new combined config in exampleSite config

* fix path to fonts when hugo is serving in a subdirectory

* update README for new option

* switch to Fira Sans

README.md

@@ -62,7 +62,7 @@ paginate=3 # articles per page
 
 [params]
 	mode="auto" # color-mode → light,dark or auto
-	featherIconsCDN=true
+	useCDN=false # don't use CDNs for fonts and icons, instead serve them locally.
 	subtitle = "Minimal and Clean [blog theme for Hugo](https://github.com/athul/archie)"
 
 # Social Tags
@@ -103,4 +103,4 @@ weight = 3
 name = "Tags"
 url = "/tags"
 weight = 4
-```
+```