configure local just-the-docs theme for jekyll

Author: rlindner81

docs/_config.yml

@@ -25,7 +25,7 @@ description: >-
 
 # Build settings
 markdown: kramdown
-remote_theme: just-the-docs/[email protected]
+theme: just-the-docs
 
 # Exclude from processing.
 # The following items will not be processed, by default.
@@ -39,7 +39,6 @@ exclude:
   - README.md
   - .sass-cache/
   - .jekyll-cache/
-  - gemfiles/
   - Gemfile
   - Gemfile.lock
   - node_modules/