managed git and deleted pre_registor scaffold for development
edited routes
almost completed mailer and contact pages
added tracker of Google Analytics for standard ver
added some ajaxs for posting new link
updated comment's views
updated README.md
added social button, view pages and class methods
updated views and did refactaring some methods
updated vies and refactored
updated category MVC and some views
added gem for compression
adjusted some functions
completed all_category model and saver
deleted category model
updated saving user_id and link_id for AllCategory
updated link_to method for improving speed and AllCategory views
updated some methods
refactored codes
updated for speed up and preparing for cache