Audio panning and reverb

[rudiHammad]

Describe the solution you'd like
Panning: allowing smooth left-right stereo positioning (currently in progress here by @rh101 https://github.com/rh101/axmol/tree/audio-enhancements. Note: there is a limitation in OpenAL that prevents any of the channels from being fully muted.”)
Reverb effects: Useful for simulating environmental acoustics, such as being inside a cave or a car entering a tunnel, to create more immersive audio experiences.

[rh101]

Panning is done, but reverb and other effects will need more work. They're supported by OpenAL, but it would be good to have a straightforward API in Axmol to be able to add any effects and filters, rather than just enable reverb and nothing else.

This is the architecture of the effects and filters in OpenAL (from page 16 of the OpenAL Effects Extensions Guide):

So, it would be good to have all that flexibility in the API so Axmol devs can use these features.

[rh101]

Panning and reverb support are merged in, so closing this issue.