resize functions

posibility if you for example have a slow internet, to set the size of the thumbnails and the large view. Some examples:
http://somedoma.in/imagr/#!ts=400 sets the thumbnail size to 400
http://somedoma.in/imagr/#!rs=800|ts=250 sets the thumbnail size to 250 and the large view size to 800
http://somedoma.in/imagr/#!rs=800 just sets the large view size to 800