Provide linker-like API for simple symbol lookups

[PathogenDavid]

Right now you have to manually search through individual archive members or ELF sections to discovery symbols for linker-like behaviors. This was fine when we only supported Windows-style .lib archives, but now that we support ELF it's kind-of annoying to deal with.

We should provide a simplified API where you can just shove static/dynamic/import libraries in and get a list of symbols out. We could also provide an API for "resolving" a symbol similar to what Biohazrd already does which would simplify more complicated scenarios like PhysX where we have to pre-resolve from static libraires for the purposes of defining an export list.

[PathogenDavid]

As a convenience, we should specifically detect if someone attempts to pass in a Windows DLL and throw a specific exception telling them to use the import library since they aren't meant for linking.

[PathogenDavid]

This should also support ELF .o and COFF .obj files as well. (The former will probably work automagically, the latter will not and requires some refactoring of our current COFF support to make it more modular like ElfFile+ElfArchiveMember.)