Adde support for restricted h5p content types.
Merge branch 'master' of github.com:h5p/h5p-php-library
Added H5PCore::getLibrariesMetadata and H5PFrameworkInterface::getPlatformInfo
Merge branch 'master' of github.com:h5p/h5p-php-library
Fixed bug in validation, which made library-upload on library admin page fail
Merge branch 'without-pal'

Conflicts:
	js/h5p-library-list.js
Improve comments
Finish up commenting the interface functions
Space fix.
Fixed typos.
Merge branch 'without-pal'

Conflicts:
	h5p.classes.php
	js/h5p-library-list.js
Merge branch 'master' of github.com:h5p/h5p-php-library
Merge branch 'master' into always-set-language-on-export
Merge branch 'always-set-language-on-export'
Resolve conflict
Merge branch 'user-results'
Resolve conflict