Make some tweaks to doc deploy script.

- Rename file to match other naming conventions.
- Simplify condition a little.

.travis.yml

@@ -12,8 +12,9 @@ env:
 jobs:
   include:
     - stage: deploy
-      script: bash util/deployGHP.sh
-      if: branch = master AND NOT type IN (pull_request)
+      script: bash util/deploy_docs_from_travis.sh
+      # Only deploy commits that land on master.
+      if: branch = master and type = push
 
 # Travis VMs are 64-bit but we compile both for 32 and 64 bit. To enable the
 # 32-bit builds to work, we need gcc-multilib.