lrudecorator overwrites wrapped function's __name__ and __doc__ (doesn't use functools.wraps)

[cabiad]

See https://docs.python.org/2/library/functools.html#functools.wraps for details.

The following ipython session demonstrates the issue:

In [8]: def s_plain(y):
   ...:     "square a number"
   ...:     return y * y
   ...: 

In [9]: s_plain.__doc__
Out[9]: 'square a number'

In [10]: s_plain.__name__
Out[10]: 's_plain'

In [11]: @lrudecorator(100)
def s(x):
    "square a number"
    return x * x
   ....: 

In [12]: s.__doc__

In [13]: s.__name__
Out[13]: 'wrapped'