swinbank, would you please have a look at this minor fix to Travis:
price@price-laptop:~/PFS/pfs_pipe2d (tickets/PIPE2D-134=) $ git sub-patch
commit 36b420585fe63b91dd8546b3b277b8d77b602416
Author: Paul Price <price@astro.princeton.edu>
Date: Wed Nov 30 22:27:43 2016 -0500
Travis: build on pushes to master branch
Currently, we're building only pull requests.
This also requires activating push builds on Travis.
diff --git a/.travis.yml b/.travis.yml
index 5d1eca5..6b742c9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,6 +14,9 @@ matrix:
fast_finish: true
notifications:
email: false
+branches:
+ only:
+ - master
# The actual installation is done under the 'script' so as to consolidate the
# necessary front-end machinery (intercept log, decide which branch to use).
diff --git a/travis.yml.TEMPLATE b/travis.yml.TEMPLATE
index 657e0e0..5a207dc 100644
--- a/travis.yml.TEMPLATE
+++ b/travis.yml.TEMPLATE
@@ -12,6 +12,9 @@ matrix:
fast_finish: true
notifications:
email: false
+branches:
+ only:
+ - master
# The actual installation is done under the 'script' so as to consolidate the
# necessary front-end machinery (intercept log, decide which branch to use).
(The other packages have equivalent changes.)
(I still need to enable push builds in Travis. Saving that until after this lands on master so we don't generate more builds than necessary.)
Looks fine. 
Thanks John.
Enabled push builds in Travis, merged to master and now everything's building.