Update README.md dependency list
@@ -18,6 +18,7 @@ NiftyNet was developed by the [Centre for Medical Image Computing][cmic] at
### Dependencies
+* six
* Python 2.7
* Tensorflow 1.0
* Nibabel 2.1
@@ -25,6 +26,7 @@ NiftyNet was developed by the [Centre for Medical Image Computing][cmic] at
* Scipy 0.19
* medpy 0.2.2
* configparser
+* scikit-image
### Usage
