Copyright policy acceptance.
Check for the user's acceptance of the school's copyright policy upon first login and upon community file and photo uploads.

Copyright information is stored in the active template language file and the user's acknowledgement date is stored in the `user_data`.`copyright` field.

Upon login: if, in the .lang.php file,  there is a valid 'copyright-firstlogin' notice and a 'copyright-version' date that is later than the that in `user_data`.`copyright`
the user is directed to the firstlogin page to agree with the copyright policy. The time of acceptance is stored in the `user_data`.`copyright` field.

Upon uploading Community photos or files: if there is a valid 'copyright-uploads' notice in the language file the user has to accept the terms before they can proceed with the upload.
Copyright policy acceptance.
Check for the user's acceptance of the school's copyright policy upon first login and upon community file and photo uploads.

Copyright information is stored in the active template language file and the user's acknowledgement date is stored in the `user_data`.`copyright` field.

Upon login: if, in the .lang.php file,  there is a valid 'copyright-firstlogin' notice and a 'copyright-version' date that is later than the that in `user_data`.`copyright`
the user is directed to the firstlogin page to agree with the copyright policy. The time of acceptance is stored in the `user_data`.`copyright` field.

Upon uploading Community photos or files: if there is a valid 'copyright-uploads' notice in the language file the user has to accept the terms before they can proceed with the upload.
Merge branch 'develop' into feature-copyright

Conflicts:
	www-root/templates/default/languages/en.lang.php
Merge branch 'develop' into feature-copyright
Visual improvements to the way that the acceptable use / copyright attestation is presented. Various minor bug fixes in a number of the Community modules.
Merge branch 'develop' into feature-copyright
Merge branch 'develop' into feature-copyright
Enhanced copyright notice format for community file and photo uploads
Enhanced copyright notice format for community file and photo uploads
Merge branch 'feature-copyright' of https://github.com/EntradaProject/entrada-1x into feature-copyright

Conflicts:
	www-root/community/modules/shares/add-file.inc.php
Merge branch 'develop' into feature-copyright

Conflicts:
	www-root/templates/default/languages/en.lang.php
Merge pull request #460 from EntradaProject/feature-copyright

Add optional requirement for users to attest a copyright policy or acceptable use agreement.