New settings and filters added; updated PHP wrapper

IDS Import: Updated version of PHP wrapper, added new settings (default
language, additional languages, updated resources, excerpts length) and
filters (resources' languages, exclude URIs) in addition. Several fixes
and improvements.
IDS View: Updated version of PHP wrapper, added new
settings (default language, excerpts length) and filters (resources'
languages, exclude URIs). Fixed pagination. Removed setting for number
of assets to import. Several fixes and improvements.