Fixing setup.sh & Crypto_Box issue

- fixing setup so it won’t ask on apt-get install
- fixing crypto_box to properly load things so sinatra_helpers won’t
fail on errors. Need to work on encrypt/decrypt errors to handle this
better and don’t load unnecessary gems. For the time being, is a quick
fix for #46 submitted by @marksee

data/scripts/setup.sh

@@ -161,7 +161,7 @@ function install_ruby_nix
     print_good "Correct version of Ruby is installed"
   else
     print_status "Installing Linux dependencies"
-    sudo apt-get install ruby2.1 ruby2.1-dev build-essential zlib1g-dev libxslt-dev libxml2-dev zlib1g zlib1g-dev libxml2 libxml2-dev libxslt-dev locate libreadline6-dev libcurl4-openssl-dev git-core libssl-dev libyaml-dev openssl autoconf libtool ncurses-dev bison curl wget xsel libapr1 libaprutil1 libsvn1 libpcap-dev
+    sudo apt-get -y install ruby2.1 ruby2.1-dev build-essential zlib1g-dev libxslt-dev libxml2-dev zlib1g zlib1g-dev libxml2 libxml2-dev libxslt-dev locate libreadline6-dev libcurl4-openssl-dev git-core libssl-dev libyaml-dev openssl autoconf libtool ncurses-dev bison curl wget xsel libapr1 libaprutil1 libsvn1 libpcap-dev
     print_status "Installing the bundler Gem"
     gem install bundler >> $LOGFILE 2>&1
   fi
@@ -179,11 +179,11 @@ function install_mongodb {
 			;;
     *Ubuntu*)
 			print_status "Installing mongodb"
-			sudo apt-get install mongodb
+			sudo apt-get -y install mongodb
 			;;
 		*Debian*)
 			print_status "Installing mongodb"
-			sudo apt-get install mongodb
+			sudo apt-get -y install mongodb
 			;;
 		*Arch*)
 			print_status "Installing mongodb"

lib/cartero/crypto_box.rb

@@ -12,6 +12,8 @@ def self.setup
     if ::Cartero::GlobalConfig["crypto"] =~ /AES/i
       require 'openssl'
       require 'digest'
+      require 'rbnacl/libsodium'
+      require 'rbnacl'
       require 'cartero/crypto/aes'
     else
       require 'rbnacl/libsodium'

lib/cartero/sinatra_helpers.rb

@@ -92,7 +92,7 @@ def log_debug(message)
 
 	def	slack_notification
     if ::Cartero::GlobalConfig["slack"]
-      @slack ||= Slack::Notifier.new ::Cartero::GlobalConfig["slack"]["webhook"],
+      @slack ||= ::Slack::Notifier.new ::Cartero::GlobalConfig["slack"]["webhook"],
         username: ::Cartero::GlobalConfig["slack"]["username"],
         channel: ::Cartero::GlobalConfig["slack"]["channel"]
       geo_loc = "#{request.location.city}/#{request.location.country}" if request.location != nil