LiBot 5.0.4

Changes:
* [authoritative] Changed the release cycle - snapshot (-N) releases are no longer tagged
* [core] changed timestamp parsing to (hopefully) act work intuitively
* [module-informative] *avatar displays image size and resolution
* [module-informative] *avatar reuploads the avatar so it doesn't get deleted on avatar change or removal
* [module-music] *seek and *loop support ogg files
Fixes:
* [authoritative] Renamed from authorative
* [module-utilities] *calc doesn't prepend '=' when the Qalculate output already includes it
* [core] Fix how absolute timestamp underflow is handled, it should wrap to the next day correctly now
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