Upgrade meek to 0.24
Version 0.24 has a fix for #20030 (moved), which prevented meek-client-torbrowser from cleaning up is subprocesses when built with Go 1.6 or later.
Here's the diff from the version we're using now. The only substantive changes are those that have to do with #20030 (moved). https://gitweb.torproject.org/pluggable-transports/meek.git/diff/?id=0.24&id2=0.22-18371-3
A patch is forthcoming.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information