Fix warnings

Gemfile

@@ -5,3 +5,15 @@ gem 'jekyll'
 
 # A modern, highly customizable, and responsive Jekyll theme for documentation with built-in search. (https://github.com/just-the-docs/just-the-docs)
 gem 'just-the-docs'
+
+# Provides a simple logging utility for outputting messages. (https://github.com/ruby/logger)
+gem 'logger'
+
+# CSV Reading and Writing (https://github.com/ruby/csv)
+gem 'csv'
+
+# Class to build custom data structures, similar to a Hash. (https://github.com/ruby/ostruct)
+gem 'ostruct'
+
+# Support for encoding and decoding binary data using a Base64 representation. (https://github.com/ruby/base64)
+gem 'base64'

Gemfile.lock

@@ -3,9 +3,11 @@ GEM
   specs:
     addressable (2.8.7)
       public_suffix (>= 2.0.2, < 7.0)
+    base64 (0.2.0)
     bigdecimal (3.1.8)
     colorator (1.1.0)
     concurrent-ruby (1.3.4)
+    csv (3.3.0)
     em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0)
@@ -55,7 +57,9 @@ GEM
     listen (3.9.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
+    logger (1.6.1)
     mercenary (0.4.0)
+    ostruct (0.6.0)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (6.0.1)
@@ -78,8 +82,12 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  base64
+  csv
   jekyll
   just-the-docs
+  logger
+  ostruct
 
 BUNDLED WITH
    2.5.20