Add function to dump a map to a vdf file

[eldoradoel]

Can you add this method? Thank you.

[andygrunwald]

Happy to accept pull requests in such a direction.
I can think of a method dump(w io.Writer).

[eldoradoel]

Due to my lack of golang language knowledge, I may not be able to complete the compilation of relevant functions.

[andygrunwald]

@eldoradoel Why did you close this issue? I think it is a great feature.

[eldoradoel]

On the one hand I implemented it, but it didn't work very well, it just worked, on the other hand valve was moving to kv3 and the demand for kv (vdf) wasn't very high.

[andygrunwald]

@eldoradoel Thanks. Would you mind posting your code as a PR?
And just for context: What is kv3 ?

[eldoradoel]

kv3 is similar to this project https://github.com/kristiker/keyvalues3, it is the first version of KeyValue from valve.

[andygrunwald]

Thx!

About the request, see #55
I leave this open until #55 is reviewed and processed.