doc: Update dependencies.

DEPENDS.txt

@@ -1,24 +1,25 @@
 Build Requirements
 ------------------
-
-* Python 2.6
+* Python 2.5
 * `Numpy <http://numpy.scipy.org/>`_
-* `Scipy <http://www.scipy.org/>`_
 * `Cython <http://www.cython.org/>`_
 
+Usage Requirements
+------------------
+* `Scipy <http://www.scipy.org/>`_
+* `Python Imaging Library (PIL) <http://www.pythonware.com/products/pil/>`_
+  
 Optional Requirements
 ---------------------
-
-You can use this Scikit with the basic requirements listed above, but additional libraries are required for image I/O and some image processing/analysis capabilities.
+You can use this scikit with the basic requirements listed above, but some
+functionality is only available with the following installed:
 
 `Open CV <http://opencv.willowgarage.com/wiki/>`_ (>= 2.0). 
    Required for functions in ``scikits.image.opencv``.
 
-`Python Imaging Library (PIL) <http://www.pythonware.com/products/pil/>`_
-   Used for ``scikits.io.imread`` and ``scikits.io.imsave``.
-
 `PyQt4 <http://wiki.python.org/moin/PyQt>`_
-   Used for ``scikits.io.imshow``.
+   The `qt` plugin that provides `imshow` and `scivy`.
 
 `PyGTK <http://www.pygtk.org/>`_
-   Used for ``scikits.io.imshow``.
+   The `gtk` plugin that provides `imshow`.
+

README.txt

@@ -11,8 +11,9 @@ http://groups.google.com/group/scikits-image
 
 Installation from source
 ------------------------
+Refer to DEPENDS.txt for a list of dependencies.
 
-This SciKit can be installed globally using
+The SciKit may be installed globally using
 
 python setup.py install
 

doc/source/_templates/index.html

@@ -32,14 +32,21 @@
 
    </td><td width="50%">
 
-      <p class="biglink">
+    <p class="biglink">
          <a class="biglink" href="{{ pathto('api/api') }}">
             API Reference</a><br/>
          <span class="linkdescr">
              Documentation for the functions included in {{project}}.
          </span></p>
 
-      <p class="biglink">
+     <p class="biglink">
+         <a class="biglink" href="{{ pathto('user_guide') }}">
+            User Guide</a><br/>
+         <span class="linkdescr">
+             Usage guidelines.
+         </span></p>
+
+     <p class="biglink">
          <a class="biglink" href="{{ pathto('license') }}">
             License Info</a><br/>
          <span class="linkdescr">

doc/source/install.txt

@@ -23,4 +23,4 @@ in-place::
 
   python setup.py build_ext -i
 
-.. include:: ../../REQUIREMENTS.txt
+.. include:: ../../DEPENDS.txt