[Review] Request from 'digitaltom' @ 'SUSE/connect/review_140930_v4_api_version_and_respect_insecure_option'

Please review the following changes:
  * d67f475 fix logging
  * fbc5da6 fix rubocop offenses
  * e6ac20f beautify if statement
  * 3e73729 rename merge to merge!
  * 2f79b0d fix test
  * 5112197 merge options after extraction and check if config url is equal to DEFAULT_URL
  * 40fa265 read values from config and merge with options
  * 6aacd07 read url and insecure values from config in cli.rb
  * 5b71f4f don't override the config attributes with nil values
  * 619afed fix assignments allignment
  * 988c23a get rid of init_utl method and respect insecure option from config
  * ab4eca1 bump API version (v4)
  * e00e9c7 add merge method to connect config class
  * 7c2bcfb load byebug and awesome_print