[MRG] Offload testing data to a separate package

build_tools/travis/install.sh

@@ -64,3 +64,5 @@ else
 fi
 
 python --version
+# Install the test data
+python -m pip install git+git://github.com/pydicom/pylibjpeg-data

pylibjpeg/__init__.py

@@ -1,8 +1,21 @@
 """Set package shortcuts."""
 
+import sys
+
 from ._version import __version__
 from .libjpeg import decode, add_handler, remove_handler, get_parameters
 
+
+# Add the testing data to pylibjpeg (if available)
+try:
+    import data as _data
+    globals()['data'] = _data
+    # Add to cache - needed for pytest
+    sys.modules['pylibjpeg.data'] = _data
+except ImportError:
+    pass
+
+# Add the pixel data handler to pydicom (if available)
 try:
     import pydicom
     add_handler()