Although I tried to keep the update to Version 2.x of Intervention Image as compatible as possible, some things have changed. Some methods became redundant, other things have been simplified and therefore had to change.
New Features
Additional support of PHP's Imagick extension
Sharpening Images
Auto Orientating
Image Filter architecture
In order to keep your application compatible, you need to keep in mind the following changes, when upgrading.
grayscale() no longer exists, use greyscale() instead.
Removed properties
width property has been removed, use width() instead.
height property has been removed, use height() instead.
Other
To keep naming consistent the filename of the configuration file for intervention/imagecache was renamed from config/imagecache.php to config/config.php.
For standalone use instantiate objects from Intervention\Image\ImageManagerStatic instead of Intervention\Image\Image. (See example)