Added a Q10 for KmSx

[BernhardAhrens]

Added one parameter to the DAMM function to make KmSx temperature-dependent with a Q10 function. Added additional slider to DAMMviz. However, I did not check the consequences for the other functions.

The range for the Q10 of KmSx is based on this paper:
Allison, S.D., Romero-Olivares, A.L., Lu, Y., Taylor, J.W., Treseder, K.K., 2018. Temperature sensitivities of extracellular enzyme Vmax and Km across thermal environments. Glob Chang Biol 24, 2884-2897.

I snuck in one additional change: when moisture is larger than porosity NaNs are returned

[AlexisRenchon]

Hey @BernhardAhrens, thanks for the PR!
Are you familiar with Julia multiple dispatch?
The idea is that you can define the same function (e.g., DAMM()) multiple times, with different arguments types.
So, for instance, we could define DAMM(x::VecOrMat{<: Real}, p::NTuple{6, Float64}) and then DAMM(x::VecOrMat{<: Real}, p::NTuple{7, Float64}), and if a user give p with 6 params, it will use the original DAMM, if the user use p with 7 params, it will use the Q10Km DAMM.

I used multiple dispatch here, for example.

Do you want to try doing it? Otherwise I will just merge your PR and then make the changes myself.
Let me know!

[BernhardAhrens]

I would let you go ahead with these changes. I think this can be a little bit of a design choice which I would leave up to you. I would rather have used a keyword argument with that Q10 set to 1.0 by default here for example

[AlexisRenchon]

I agree Q10 = 1.0 is a better choice