Added a lot of comments to the TravisCI ZIP release section, for Christian's benefit.

.travis.yml

@@ -26,10 +26,20 @@
 
 language: cpp
 branches:
+    # We need to whitelist the branches which we want to have "push" automation.
+    # Pull requests will be built whatever the branches are for them.
     only:
         - develop
         - release
-        - standalone
+    
+    # This blacklisting is an (unsuccessful) attempt to filter out some currently
+    # unexplained 'untagged' builds which are endemic in bobsummerwill/cpp-ethereum
+    # in my 'merge_repos' branch.   I suspect that these are rogue tags which
+    # are being created by Appveyor as part of the Github Releases flow, but
+    # I haven't pinned it down yet.
+    #
+    # See https://github.com/ethereum/webthree-umbrella/issues/697
+    # See https://twitter.com/BobSummerwill/status/762802834857340929
     except:
         - /develop-v[0-9]/
 matrix:
@@ -137,6 +147,34 @@ deploy:
     # which generates ZIPs per commit.  We are in agreement that
     # generating ZIPs per commit for the develop branch is probably
     # just noise, so we only run this deployment target on 'release'.
+    #
+    # Unlike the Appveyor GitHub Releases target, the support in TravisCI
+    # seemingly doesn't provide a means for passing a description, tag, etc.
+    # In practice, we are letting the Appveyor CI do all that stuff, and
+    # then this deployment flow just seems to find that most recent tag,
+    # and just add our Linux and macOS ZIPs into the same tag, which is
+    # what we want to happen.  But is very accidental and brittle-looking.
+    #
+    # The 'skip_cleanup' stops the workspace being cleaned out prior to
+    # generation of the artifacts.  Strange that we should explicitly
+    # need to do that, but we do.
+    #
+    # Tokens in TravisCI can be generated a few different ways.  Bob had
+    # success using the 'travis' gem, and then using that gem to
+    # create/edit this .travis.yml file, and then cut-and-pasting the
+    # good bits back out of what it generated.  The gem changes all the
+    # whitespace and deletes comments, so cannot be used as-is.  But
+    # it does generate an appropriate auth token.
+    #
+    # TODO - I do not know if the api_key below which work correctly
+    # for ethereum/solidity.   I suspect not, for the same reason as
+    # my auth token does not work for Appveyor.  I don't have enough
+    # permissions to enable this myself.  Christian should be able to.
+    #
+    # See https://docs.travis-ci.com/user/deployment/releases
+    # See https://blog.travis-ci.com/2013-01-28-token-token-token/
+    # See https://github.com/ethereum/webthree-umbrella/issues/658
+    #
     - provider: releases
       api_key:
           secure: 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