v1.4.0

• Added dlintott to contributors.
• Fixed non-existent settings js from being enqueued.
• Changed all 'ride' styles and functions to 'activity'.
• Added inline documentation.
• Updated coding standards to WordPress where possible.
• Added Screenshots.
• Removed target="_blank" from hrefs for accessibility best practices.
• Added links from activity and route shortcodes to respective strava page.
• Removed all instances of extract().