Implement Falcon FN-DSA from FIPS-206

[paulmillr]

Falcon (https://falcon-sign.info) would appear in FIPS-206 soon, it should be implemented in the library.

Estimate: 4 weeks, because it's extremely complicated (floating point math etc).

[paulmillr]

Still no final spec of FIPS-206 and unclear when it would appear

[Loque18]

any chances this gets released soon ?

[paulmillr]

@Loque18 yes, if you would like to fund it.

[eshikerya]

@paulmillr how much would it cost?

[paulmillr]

@eshikerya sent some estimates via email

[Loque18]

please let me know if it gets implemented thanks, send email to me as well @eshikerya

[paulmillr]

everyone who's looking for some specifics please send me an email in profile @Loque18

[paulmillr]

Done, live in 0.6.0