Cannot parse loaded image due to rigidity around parsing Attribute Certificates

[suttonbradley]

Currently, there is no option to skip parsing of attribute certificates, which prevents parsing loaded images because the loader does not include these certificates (just before "Section Data"). Per the linked docs:

Another exception is that attribute certificate and debug information must be placed at the very end of an image file, with the attribute certificate table immediately preceding the debug section, because the loader does not map these into memory.

Related: #312. I thought that issue was too general for this concern, so I made a new one. I haven't run into issues with the address resolution -- I'm using the resolve_rva field of ParseOptions to deal with that; however, forced parsing of the attribute certificate table is blocking for the emulation-based fuzzing project I work on, where we need to parse PEs straight from their in-memory representation.