Moved Mixed Logarithm notation to core from community.
Note: This is a breaking change. I expect there may be other similar breaking changes (notations moving) in upcoming third-digit changes. I know this violates semvar but the convenience of adding one new notation to AD at a time and not having the version number become 10.0.0 outweighs it for me. You can do new (ADNotations[x] || ADCommunityNotations[x])(); where x is the notation name if you want to always update to the most recent version but not be affected by these changes. If you don't currently use any community notations, you should probably not be affected by these changes in any case.