Improve estimate_delay

[Datseris]

Alright, its about time for fundamentally improving the function estimate_delay.

For the Gissinger system at default parameters it gives delay 500 while very good values are in the range of 30-40 for timestep dt = 0.05.

Notice however that the delay time suggested by the function multiplied with dt gives the perfect delay of around 30.

Hmmmmmm

[Datseris]

This is not actually a bug, the function does exactly what it says in the doc string.

More like "improve the function precision".

[Datseris]

This issue was moved to JuliaDynamics/ChaosTools.jl#12