Clang and GCC: Large number of warnings at -Wall

Draco also cannot be built or used using Clang or GCC with -Wall -Werror

This makes it rather difficult (and noisy) to integrate into many modern projects, as it is often recommended to have -Wall -Werror enabled.

The warnings I have disabled to build 1.4.1 are:
"-Wno-absolute-value"
"-Wno-bool-compare"
"-Wno-comment"
"-Wno-maybe-uninitialized"
"-Wno-sign-compare"
"-Wno-unused-local-typedefs"

It also appears that the following warnings must be disabled via pragma in order to use the library for glTF:
"-Wno-bool-compare"
"-Wno-sign-compare"