adding cython numpy example code
tweak the exercises
section on cython with numpy
exercise tweaks
move shared files from ctypes
adding the plot
remove the comment since the file will be shared
replace common files in swig numpy example
shared files for cython numpy example
shared files for cytpes numpy
missing image
rename to avoid ambiguities with python builtins
fix the swig numpy example
fix the cython numpy example
section for cython exercises
better prealloc
tweak the exercises some more
spelling of Numpy
tweak the exercises some more