Received the following error when using the PDF Submission plugin:

Strict standards: Declaration of assign_submission_pdf::get_files() should be compatible with that of assign_plugin::get_files() in /var/www/moodle/mod/assign/submission/pdf/locallib.php on line 788

This very minor edit prevents the error appearing simply by replicating the expected passed objects.
Merge pull request #1 from vaughany/master

PHP strict standards warning and fix
Update version number + mark as stable
Fix editing of template items
Correctly handle landscape-oriented pages in PDFs
Updated README / version
'Download all submissions' now downloads the final submission (if submitted for marking)
Move PDF libraries from submission plugin to feedback plugin

To give more flexibility if the submission plugin is dropped in the future
Hide the plugin if the ghostscript path is misconfigured
Fixed typo in foreign key in DB definition
Automatically disable the plugin if gspath is set incorrectly
Fix the 'submit_for_grading' signature
Merge remote-tracking branch 'origin/master'
Tweak README file
Fix support for team submissions
Codechecker clean-up
Remove unfinished resubmission support code (as M2.5 already has proper resubmission support)
Add behat test for generating PDF + fix error in doing so in firefox
Update version number
Fix bad version number