Update README.md

README.md

@@ -1,20 +1,21 @@
 # Stimuli
 
 Contains submodules for
-- creating different stimuli used in lightness perception ([lightness](src/README.md))
+- creating different stimuli used in lightness perception ([lightness](src/README.md#lightness))
 - creating 2D patterns or renderings of 3D checkerboards with transparent 
 layers covering part of the image ([transparency](src/transparency/README.md))
 - creating different random and deterministic textures ([texture](src/texture/README.md))
-- some helper functions for padding, resizing, computing Munsell values, and
-converting pixel values to degrees of visual angle ([utils](src/README.md))
 - various functions that calculate contrast metrics ([contrast_metrics](src/README.md#contrast-metrics))
+- some helper functions for padding, resizing, computing Munsell values, and
+converting pixel values to degrees of visual angle ([utils](src/README.md#utils))
+
 
 For details, please refer to the source directory (src/), the respective subdirectories and the docstrings.
 
 ## Dependencies
 - Required: numpy, matplotlib, PIL
 - Optional: 
-    - PovRay (to render variegated checkerboards - submodule transparency.CheckerboardFactory])
+    - [PovRay](http://www.povray.org/) (to render variegated checkerboards - submodule transparency.CheckerboardFactory])
     - rpy2 and R (to render textures with specific spatial properties - submodule texture)
 
 
@@ -37,7 +38,7 @@ To use in your own code, import the modules. See READMEs in src/ for example usa
 from stimuli import lightness
 from stimuli.transparency import TextureFactory
 from stimuli.transparency import CheckerboardFactory
-from stimuli import contrast_measures as cm
+from stimuli import contrast_metrics as cm
 from stimuli import utils
 # (other modules are yet to be fixed)
 ```