v4: Add standalone mode
Bump version to v4.1.0
v4-standalone: Fix bug when image urls have GET parameters
v4: Better form error display (e.g. invalid image file uploaded)
v4-standalone: Allow max_w & max_h GET param support
v4-standalone: Add hooks to customize ckeditor plugin
Bump version to v4.1.1
v4-standalone: Fix bug w/ preview sizes from dl'ed imgs

Also fix calculation of width and height placeholders in standalone mode.
v4-standalone: Don't allow users to enter sizes gt original
Bump version to v4.1.2
v4: Fix errors if file uploaded has no extension
Bump version to v4.1.3
v4 Templatetag
v4: Fix bug where thumb can't get width from size
Bump version to v4.1.5
v4: Increment ?v params on static files
Bump version to v4.1.6
v4: Assign file path with image.name, not image.path
Bump version to v4.1.7
Fix hardcoded ID bug