Stability rc1

• New option: ajax-button
• Added new hooks:
  • tf_done
  • tf_pre_save_admin_{namespace}
  • tf_save_admin_{namespace}
  • tf_pre_reset_admin_{namespace}
  • tf_reset_admin_{namespace}
• Added desc option for headers
• Removed unused tracking code
• Tweaked customizer font css
• Added label for blank page/post titles for page/post options
• Updated & namespaced SCSSPHP
• Saving '0' values now work (e.g. in select options)
• Additional check to prevent scss compile of empty string
• Fixed bug where sometimes options without IDs (e.g. note) produce errors in the Customizer
• Fixed possible JS running in iframe-font-preview + empty checks for CWE-200
• getOption no longer throws a "called too early" warning and can now be called anywhere
• #240 Update class-option-font.php
• #235 Update class-option-checkbox.php
• #262 Namespace invisible class
• #264 Switch to strpos instead of preg_match
• #253 Remove timepicker from requirements