Added 7.x-1.x changes.
Added loadLibraries() to interface
Merge branch 'master' of github.com:h5p/h5p-php-library
Made sure main content id isn't required.

Conflicts:
	h5p.classes.php
Made it possible to delete libraries without having to load them again.
Merge branch 'master' of github.com:h5p/h5p-php-library

Conflicts:
	h5p.classes.php
Fixed so that filtered params can be stored in the contents table.
Made it possible to display the library list in a human readable form.
Made sure only content libraries can be upgraded.
Merge branch 'master' of github.com:h5p/h5p-php-library
Changes related to listing unsupported libraries, and upgrade of all installed libraries
Updated library-support to latest of all minors
Fixed bug where it appears like you can upgrade libraries without content.
Merge branch 'master' of github.com:h5p/h5p-php-library
Revert "Fixed bug where it appears like you can upgrade libraries without content."
Source was elsewhere.

This reverts commit 72d38fd977e058ec07ae9ad7847378a80227187b.
Did some minor refactoring of "minimum version support" to ease implementation of this in other systems.
Added missing $this->.
Updates relevant for upgrade-all-libraries feature
Merge branch 'master' of github.com:h5p/h5p-php-library

Conflicts:
	h5p.classes.php
Merge branch 'master' of github.com:h5p/h5p-php-library