add parameter indexer, we are not completely independent from container file, also local file parser are deprecated; indexer does the same stuff in a nicer way
add parameter dic, migrate all yaml extension to new indexed way, remove redundant local file resolving
moving service index stuff
parse parameter directly as lower case only
fix npe on incomplete class statements on yaml
prevent indexing configured container files, to reduce duplicate names; directly use global scope instead for phpindex
migrate service reference to index collector, remove local service map code, filter search scope to only search inside config files, prepare a collector design pattern for better performance