Add support for some OpenAL Soft extentions

[sercero]

• Add support for IEEE float recording
• Add support for ALC_SOFT_pause_device (https://openal-soft.org/openal-extensions/SOFT_pause_device.txt)
• Reorder the position of some functions to be close to their siblings
• Whitespace fixes
• Improved some descriptions

@paroj let me know if you want to take a look at the code or I'll just merge it.

Another thing: I need your help in doing a release before doing some changes to the API.

There are some problems with the current design and I was planning to make some changes to the API.

So I want to make a release before that.

Oh, another thing: If I were to merge the pull request, which option should I choose?

Thanks!

[paroj]

If I were to merge the pull request, which option should I choose?

I prefer using rebase merge as this results in a cleaner history. Squash does the same, but combines all commits into one. This is useful to get rid of superficial "fixup" commits.

[paroj]

Another thing: I need your help in doing a release before doing some changes to the API.

releases are easy:

• first take a look at the commits since the last release: https://github.com/OGRECave/ogre-audiovideo/compare/21.07...master and put the relevant changes (what do you care about as a user?) in the release notes.
• create the release at: https://github.com/OGRECave/ogre-audiovideo/releases/new using "21.09" as tag and title