Add module docstring and license for soc, soc.models, soc.views.helper.templatetags. Patch by: Pawel Solyga

Remove python-graph from thirdparty, remove check_includes script and graph folder from scripts. This functionality is (cyclic imports check) is supported by pylint automatically so we don't need that any more. Patch by: Pawel Solyga Review by: Sverre Rabbelier

Fix too long lines in soc.views.models.request, remove unused imports and change pending requests list description. Remove unused imports from soc.logic.path_link_name module. Patch by: Pawel Solyga