v5.0.0 CDN version only and bugs fixes release

• CDN version only (breaking changes)
• Upgrade rails to 5.2.x
• Remove refile support due no activity since 2015
• Remove auto-detect content-type and image dimensions
• Fix crash on "upload file" 3rd tab

v4.4.0 Bugs fix release (has been yanked)

• CDN version only
• Upgrade rails to 5.2.x
• Remove refile support due no activity since 2015
• Remove auto-detect content-type and image dimensions

Upgrade CKEditor to 4.6.1 full version

Upgrade CKEditor to 4.6.1 full version

Upgrade CKEditor to 4.6.1 version

Upgrade CKEditor to 4.6.1 version (08 Dec 2016), Standard Package - 48 plugins

Rails 5 support

Rails 5 support
Update CKEditor to version 4.5.10 (13 Jul 2016)
Rubocop style fixes