Expand checkout depth

Author: ahankinson

.travis.yml

@@ -10,7 +10,7 @@ env:
  - PATH_TO_SAXON_JAR=Saxon-HE-9.6.0-7.jar PATH_TO_JING=/usr/bin/jing PATH_TO_TEI_STYLESHEETS=$TRAVIS_BUILD_DIR/Stylesheets
 
 before_install:
-    - git clone --depth=1 https://github.com/TEIC/Stylesheets.git
+    - git clone https://github.com/TEIC/Stylesheets.git
     - cd Stylesheets && git checkout dc2aecc845e44ad0317e4e6562eeaa4eee639b9c && git reset --hard
     - cd ../
     - curl -O http://central.maven.org/maven2/net/sf/saxon/Saxon-HE/9.6.0-7/Saxon-HE-9.6.0-7.jar