Removed the ignoring of .project, .cproject, .metadata, and .settings

I think we can probably ignore .metadata and/or .settings, but thought I'd add them for now and see what happens.
Eliminated that annoying issue with Eclipse reporting methods and symbols cannot be resolved, but the build works fine. I found a stack overflow post saying that Project>Properties>C/C++ Build>Settings>Binary Parsers should have "Elf Parser" unchecked. This resolved the problem.

I think this fix is included in the Ardu_Pilot/.settings/org.eclipse.cdt.codan.core.prefs file.