add readme

README.md

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+# pybox
+
+This is another toolbox providing access to Python from MATLAB, with the
+goals of building on MATLAB's new support for Python.
+
+## conda
+
+Miniconda from Continuum is used for setting up environments with prebuilt
+packages, in cross platform fashion (or at least as much as conda is) 
+especially onerous for scientific libraries.
+
+For example
+
+```matlab
+>>> conda install py  % setup conda installation (dl if needed)
+... 
+>>> conda use py  % tell pybox where is conda installation
+>>> conda create -n foo numpy   % make an environment with numpy
+...
+>>> py.numpy.random.rand(3)    % make array of random numbers
+
+ans = 
+
+  Python ndarray with properties:
+
+           T: [1x1 py.numpy.ndarray]
+        base: [1x1 py.NoneType]
+      ctypes: [1x1 py.numpy.core._internal._ctypes]
+        data: [1x24 py.buffer]
+       dtype: [1x1 py.numpy.dtype]
+       flags: [1x1 py.numpy.flagsobj]
+        flat: [1x1 py.numpy.flatiter]
+        imag: [1x1 py.numpy.ndarray]
+    itemsize: 8
+      nbytes: 24
+        ndim: 1
+        real: [1x1 py.numpy.ndarray]
+       shape: [1x1 py.tuple]
+        size: 3
+     strides: [1x1 py.tuple]
+
+    [ 0.32473666  0.59561982  0.77702851]
+
+```