* Module rename.
Merge branch 'master' of https://github.com/wouterbeek/WebQR
* [WEBQR_WEB,FIX] Solved the dependencies for js_script/1 problem: JS dependencies are defined in the HTML body (using html_requires/1) and not in the HTML head (where they are placed by Prolog automatically).
* [WEBQR_WEB,FIX] Solved the occurrence of  in the absolute URI. Do not use  in .
* [WEBQR_WEB,SC] Add indentation for conditional compilation statements.
Updates to PUT and POST for circles.

* [QSIM_BUILD,SC] Remove add_concept/3. Concept adding is performed at the WebQR-level (the same for all QR dialects).
* [WEBQR_BUILD,EXT] Added webqr_create_circle/3 and webqr_update_circle/4. Rewrote the way in which WebQR circles are added (POST) and updated (PUT). A lot of code is shared!
* [WEBQR_GRAPH,NEW] New module supporting the local and global graphs of a user's QR model.
* [WEBQR_HTTP,EXT] Updates the handling of POST and PUT requests for circles.