Author: Damyon Wiese
MDL-52954 core: Add a document converter to file_storage
This lets us convert between common office formats. E.g. docx -> pdf
html -> pdf, html -> ods.
This commit also updates assignment editpdf plugin to use this converter
on all compatible submission files.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=2e76c14e11c14392263a69c7064ff6adbdfca450
http://github.com/moodle/moodle/commit/2e76c14e11c14392263a69c7064ff6adbdfca450
+ 3.1 en [pathtopandoc,core_admin]
+ 3.1 en [pathtopandoc_help,core_admin]