Store and Restore

[wahern]

Need to provide interface for storing and restoring (aka exporting and importing) the generated hash function. Applications must currently do this on their own.

[bakwc]

Is it enough to serialize content of struct phf? I mean seed, r, m, d_max, g_op by value, and also store content of memory starting from g of r size? No recursion / etc required?

[pps83]

It would be really helpful it Readme.md showed actual use in c/c++: sample keys, generated hash function and how it could be used and what the purpose of it all