Update easyimage.js

Using "-thumbnail" to create thumbnail (twice as fast).
Using "-interpolate bicubic" to better mimic Photoshop's "save for web"
Using "-strip" to remove color profile, etc as it's not needed for thumbnails (greater than 50% file size saving on a thumbnail of 300x300px, much bigger file size saving on smaller ones).
Merge branch 'scottbert-master'
thumbnails improved
version bump