Merge pull request #252 from Maks3w/hotfix/secure-rubygems

Hotfix/secure rubygems

Gemfile

-source 'http://rubygems.org'
+source 'https://rubygems.org'
 
 # Middleman
 gem 'middleman', '~>3.3.10'

Gemfile.lock

 GEM
-  remote: http://rubygems.org/
+  remote: https://rubygems.org/
   specs:
     activesupport (4.1.10)
       i18n (~> 0.6, >= 0.6.9)