Merge pull request #913 from stephengroat/patch-1

test brew HEAD installs

.travis.yml

@@ -23,6 +23,17 @@ addons:
     packages:
     #- g++-6
 
+matrix:
+  include:
+    - os: osx
+      install:
+      script: brew install tesseract --HEAD
+      cache:
+        directories:
+          - $HOME/Library/Caches/Homebrew
+  allow_failures:
+    - script: brew install tesseract --HEAD
+
 cache:
   directories:
   - leptonica-$LEPT_VER