Use references in statically linked code detection

[PeterMatula]

Right now, we only search for ordinary YARA patterns in binary data when we apply statically linked code signatures. However, our YARA rules contain metadata with references that should be checked before applying any rule. We do not do it now. Without it, detections are less reliable and we need some hacks to even get some regression tests passing.

[PeterMatula]

Added together with decoder rewrite #116.