Update release notes for 1.15
Update release notes for 1.15
Merge branch 'wm-notes-1.15.0' of https://github.com/rethinkdb/rethinkdb into wm-notes-1.15.0

Conflicts:
	NOTES.md
Add missing PR
Add a few newly-closed issues
Fix version number
Fix errant edit
Updates based on comments
More updates, two new issues
Change release name
Change 'update' to 'replace'
Clarify "upgrading" tables
Worked around cpplint recursion bugs in a bunch of geo code.

It all mysteriously was scoped_keyvalue_pair_t && that tripped IsRValueType recursion.
initial commit for #3084 polyglot/sindex/truncation.rb failing with "can't convert Fixnum into String"
initial commit for #3081 macos pkg permissions
Add openssl to external packages and remove gnutls
workaround to allow MacOS to statically link openssl
Merge branch openssl into v1.15.x

Review 2101 by @larkost
Closes #2676
Closes #2949
Revert "changing internal geo format to store coordinates as objects rather than tuples"

This reverts commit d0b4eecf3dc72bd4c6c7f07fd3a52495069dec17.
changing order of lat_lon -> lon_lat