Evaluating using Boost.JSON

[jcoupey]

Boost has its own JSON library, and I've heard that it's easier and more intuitive to use than rapidjson. Switching may not harm performance, provided we trust their benchmarks.

Add to this the fact that rapidjson is painfully unmaintained unversioned, maybe we should consider switching. Of course we'd have to evaluate that in the light of our use-case. The most demanding part for us is probably the parsing of huge matrices spitted out by routing engines.

[SebMilardo]

Hi! Could you assign this issue to me?