Add plugin callback for log update notifications

This should allow plugins to implement their own version of a log window
without having to worry about providing lightweight-ish and non-blocking
callback functions for OBSApi.
Add support for per service list of supported audio codecs

Currently only handles the vanilla OBS case of two possible codecs, i.e.
it won't list multiple listed supported codecs as alternatives in the
warning message; also doesn't verify that the listed codecs are actually
available in OBS

Other than that it supports multiple "supported audio codec" entries
in services.xconfig per service, in case anyone wants to white list
both MP3 and AAC for their service:

```
recommended : {
 "supported audio codec" : "MP3"
 "supported audio codec" : "AAC"
}
```
Add AAC as supported audio codec for hitbox.tv (i.e. black list MP3)

Using MP3 breaks sound in VODs according to @Gol-D-Ace
Add 'profile' advanced option support for QSV encoder

Fix #304
Show audio codec warning even if it is the only warning
Update localization strings from crowdin
Update authors file with latest translators
Merge pull request #310 from dodgepong/latest-crowdin-translations

Update localization strings from crowdin
Correct typo in german locale file
Reverted nvidia optimus enablement

Turned out to be causing crashes in some cases.  I wish they had better
laptop drivers.
Updated to version 0.61b