Add make instruction for doctest
Let travis run doctests
Fix corner doc tests
Fix corner_subpix function for corners near border
Add example for corner_subpix function
Fix doctest of remove_small_objects
Fix watershed doctest
Fix hough_line_peaks doctest
Fix block_reduce doctest
Fix RANSAC doctest
Use NORMALIZE_WHITESPACE directive for block_reduce doctest
Fix montage2d doctest
Remove plotter from doctest and use comparison to np.histogram instead
Fix precision of output in hough_line_peaks doctest
Install nose from PyPI
Remove unnecessary coverage directive
Install PyQt4 for doctests
Install Cython from apt
Fix PyQt4 for python 3
Install xserver