Make the bin file more standard

This removes the obsolete -with-config style of bin file
with the standard OpenFlight format

bin/asset

@@ -26,8 +26,42 @@
 # https://github.com/alces-flight/alces-flight/flight-asset-cli
 #==============================================================================
 
-# Adds the config onto the front of ARGV
-ARGV.unshift File.expand_path('../etc/config.yaml', __dir__)
+begin
+  # Reads the environment setup
+  ENV['BUNDLE_GEMFILE'] ||= File.join(__FILE__, '../../Gemfile')
 
-load File.join(__dir__, 'asset-with-config')
+  require 'rubygems'
+  require 'bundler'
+  Bundler.setup(:default)
 
+  # Loads the config
+  require_relative '../lib/flight_asset/config'
+
+  # Attempt to enable development mode if requested
+  if FlightAsset::Config::CACHE.development?
+    begin
+      Bundler.setup(:default, :development)
+      require 'pry'
+      require 'pry-byebug'
+    rescue StandardError, LoadError
+      Bundler.setup(:default)
+      $stderr.puts "An error occurred when enabling development mode!"
+    end
+  end
+
+  # Builds and runs the CLI
+  require_relative '../lib/flight_asset/cli'
+
+  # Runs the command within the original directory
+  Dir.chdir(ENV.fetch('FLIGHT_CWD', '.')) do
+    OpenFlight.set_standard_env rescue nil
+    FlightAsset::CLI.run!(*ARGV)
+  end
+rescue Interrupt
+  if Kernel.const_defined?(:Paint)
+    $stderr.puts "\n#{Paint['WARNING', :underline, :yellow]}: Cancelled by user"
+  else
+    $stderr.puts "\nWARNING: Cancelled by user"
+  end
+  exit(130)
+end