GitLab

Fixed leak when adding duplicate keys (and actually changed the behavior - now we take the first instance, not the last)

Refactored emitter operator << overloads to not template them, so it's easier to overload for pointer types

Refactored the traits a bit, and added displaying the key to string and numeric key not found errors

Fixed the return value of the integral conversion functions, and also unset the dec flag so it reads other bases (just a temporary fix, since we're officially supposed to read binary too)

Updated the CMake globbing so it only compiles sources starting with a lowercase letter (apparently Mac OS auto-generates files looking like ._whatever and it was trying to compile those too)