Add bootstrap_form gem

Gemfile

@@ -123,6 +123,7 @@ gem 'asciidoctor', '~> 1.5.2'
 gem 'asciidoctor-plantuml', '0.0.7'
 gem 'rouge', '~> 2.0'
 gem 'truncato', '~> 0.7.8'
+gem 'bootstrap_form', '~> 2.7.0'
 
 # See https://groups.google.com/forum/#!topic/ruby-security-ann/aSbgDiwb24s
 # and https://groups.google.com/forum/#!topic/ruby-security-ann/Dy7YiKb_pMM

Gemfile.lock

@@ -88,6 +88,7 @@ GEM
     bootstrap-sass (3.3.6)
       autoprefixer-rails (>= 5.2.1)
       sass (>= 3.3.4)
+    bootstrap_form (2.7.0)
     brakeman (3.6.1)
     browser (2.2.0)
     builder (3.2.3)
@@ -930,6 +931,7 @@ DEPENDENCIES
   binding_of_caller (~> 0.7.2)
   bootsnap (~> 1.0.0)
   bootstrap-sass (~> 3.3.0)
+  bootstrap_form (~> 2.7.0)
   brakeman (~> 3.6.0)
   browser (~> 2.2)
   bullet (~> 5.5.0)