Update multi_image test and install tifffile for travis.

skimage/io/collection.py

@@ -115,7 +115,7 @@ class MultiImage(object):
         self._dtype = dtype
         self._cached = None
 
-        
+
         if filename.lower().endswith(('.tiff', '.tif')):
             self.tif_img = img = TiffFile(self._filename)
 
@@ -139,11 +139,8 @@ class MultiImage(object):
 
     def _find_numframes(self, img):
         """Find the number of frames in the multi-img."""
-<<<<<<< HEAD
+        
         if self.tif_img:
-=======
-        if self._tif_img:
->>>>>>> 70b6909... Add tifffile support for MultiImage
             return len(img.pages)
         i = 0
         while True: