Use HTTPS Protocol in Gemfile

Switch to the https protocol in the Gemfile & Gemfile.lock since the
git protocol is sometimes blocked by firewalls (and is not easily proxied)

Gemfile

@@ -8,7 +8,7 @@ gem 'stamp'
 gem 'kaminari'
 gem 'haml-rails'
 gem 'jquery-rails'
-gem 'grit', :git => 'git://github.com/gitlabhq/grit.git'
+gem 'grit', :git => 'https://github.com/gitlabhq/grit.git'
 gem "carrierwave"
 gem 'six'
 gem 'therubyracer'
@@ -32,7 +32,7 @@ end
 group :development do
   gem 'letter_opener'
   gem 'rails-footnotes', '~> 3.7.5'
-  gem 'annotate', :git => 'git://github.com/ctran/annotate_models.git'
+  gem 'annotate', :git => 'https://github.com/ctran/annotate_models.git'
 end
 
 group :development, :test do

Gemfile.lock

 GIT
-  remote: git://github.com/ctran/annotate_models.git
+  remote: https://github.com/ctran/annotate_models.git
   revision: fb73329243056a6d9a64878e5c543aba9b6417de
   specs:
     annotate (2.4.1.beta1)
 
 GIT
-  remote: git://github.com/gitlabhq/grit.git
+  remote: https://github.com/gitlabhq/grit.git
   revision: ff015074ef35bd94cba943f9c0f98e161ab5851c
   specs:
     grit (2.4.1)