Added a new default meme

Third-person hold stance is now consistent with first-person (held with 2 hands), to match Gmod update

Fixed new default upgraded meme not having looping sound

Added a new default upgraded meme

Hopefully fixed first meme is always the same bug coming back

The default memes are now automatically removed if you add at least one of your own memes

Added ttt_meme_gun_always_include_default_memes 0, which controls whether default memes are still included in the pool even if you add your own memes

Removed some default memes, added a couple of new ones

Upgraded meme gun sounds now loop, now supports any sound file format Gmod does

Added a new meme for the upgraded meme gun

Removed a meme for the upgraded meme gun