(feat) add a new module: Flickr

(feat) add a new module: Flickr
(fix) change the pathFunc in order to allow different callback names
(fix) modeules comment
(feat) add flickr as source to the Collage demo

(feat) add flickr as source to the Collage demo
(fix) add the flickr_id to the client_ids.js
Merging Flickr module and demos