Text align
Removed old caching system.
Use content variable for filtered parameters.
Added getOption/setOption.
Improved error handling when upgrading content.
Specifying language code is now required when getting library translations.
Use correct semantics.
Merge branch 'without-pal' of github.com:h5p/h5p-php-library into user-results

Conflicts:
	js/h5p-content-upgrade.js
	styles/h5p-admin.css
Merge branch 'without-pal' of github.com:h5p/h5p-php-library into without-pal

Conflicts:
	js/h5p-content-upgrade.js
Updated comment
Merge branch 'without-pal' into user-results