Typed cpdef()

[itziakos]

This PR updates the notes to include benchmarks for using a typed cpdef function for the Fibonacci function (recursive algorithm).

in more details:

• All typed functions now return long to be consistent with the C implementation of the fibonacci function.
• A new bechmark script is provided
• Documentation is updated with the benchmarking of the typed cpdef (it is as fast or even faster than the hand written C wrapper.
• A simple script is provided to create the comparison graph.
• A testcase is added for the fibonacci functions.
• A make.bat is provided for compiling the documentation under windows