MDL-45843 mod_lti: Added require_capability

Added require_capability to registrationreturn.php
MDL-45843 mod_lti: SQL and EOL updates

Moved PHP variable in SQL into a named parameter
Improved checks for end-of-line characters to include CR and LF on their
own or together
MDL-45843 mod_lti: Check for semicolon separators

Semicolon separators in custom parameters are changed to EOL characters
when upgrading to the 2014100100 version.
MDL-45843 mod_lti: Remove unused file

basiclti.js file not being used so removed.