spawnitem won't create generic items unless you intend to
generic items will retain the data for what item they were if a mod is uninstalled, and will attempt to restore themselves if re-installed
On Linux and macOS, using Clang to compile OpenStarbound produces about 400 MB worth of warnings during the build, making the compiler output unreadable and slowing the build down considerably.
99% of the warnings were unqualified uses of std::move and std::forward, which are now all properly qualified.
Fixed a few other minor warnings about non-virtual destructors and some uses of std::move preventing copy elision on temporary objects.
Most remaining warnings are now unused parameters.
