Add deconvolution module to skimage.

This module add three function to skimage. The `wiener` function is a
simple wiener deconvolution. The `unsupervised_wiener` is a more
sophisticated wiener deconvolution with automatic estimation of
regularisation parameters. The third function is a literal traduction
in python of the rychardson lucy deconvolution of wikipedia.

skimage/deconvolution/__init__.py

@@ -0,0 +1,27 @@
+"""Skimage module for image deconvolution
+
+This module implement various algorithm of the literarture for image
+deconvolution.
+
+References
+----------
+.. [1] François Orieux, Jean-François Giovannelli, and Thomas
+       Rodet, "Bayesian estimation of regularization and point
+       spread function parameters for Wiener-Hunt deconvolution",
+       J. Opt. Soc. Am. A 27, 1593-1607 (2010)
+
+       http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-27-7-1593
+
+.. [2] Richardson, William Hadley, "Bayesian-Based Iterative Method of
+       Image Restoration". JOSA 62 (1): 55–59. doi:10.1364/JOSA.62.000055, 1972
+
+.. [3] B. R. Hunt "A matrix theory proof of the discrete
+       convolution theorem", IEEE Trans. on Audio and
+       Electroacoustics, vol. au-19, no. 4, pp. 285-288, dec. 1971
+"""
+
+from .wiener import wiener, unsupervised_wiener, richardson_lucy
+
+__all__ = ['wiener',
+           "unsupervised_wiener",
+           "richardson_lucy"]