Overhauled leb128:     handles integers < 8 bits     incorrect overflow bugs fixed     simplified *mem implementations     added wrte* functions     added thurough write/read testing
Overhauled leb128:
    handles integers < 8 bits
    incorrect overflow bugs fixed
    simplified *mem implementations
    added wrte* functions
    added thurough write/read testing

zig-lang/zig,raulgrell/zig,zig-lang/zig,raulgrell/zig,andrewrk/zig,raulgrell/zig,raulgrell/zig,andrewrk/zig,raulgrell/zig,zig-lang/zig