Merge pull request #91 from beghelli/ojs-stable-2_4

Retrieving URL components bug fix
Add recaptcha support for Notification Mailing List
Merge branch 'ojs-stable-2_4' of ssh://github.com/pkp/pkp-lib into uls-install
*8748* Fixed identation and add reference required comment
Fix inline doc for RECAPTCHA for Notification subscription request.
Merge pull request #93 from ulsdevteam/uls-install

*8757* Add RECAPTCHA to Notification subscription request
Copyright notice tweaks
*8771* Suppress out-of-bound array index warning