@newpavlov review please?

There are a few errors I didn't know what to do with.

Hm, I am not that knowledgeable about CI setups and WASM, so not sure if I will be able to help. At a cursory look I couldn't find anything out of place. I think that after fixing the obvious failures it will be better to link this PR on users forum and reddit and ask for reviews.

Lets see how many of the failures the last patch fixes...

I'm not too concerned about reviewing the Travis config; I have a reasonable understanding of what it does even if I dislike poking it. I've also tested the WASM stuff locally, including with intentionally-failing tests.

But @newpavlov I would like your opinion on the code changes to the lib itself.

BTW I brought the cloudabi lib back as a dependency; I prefer to make use of external API crates where they exist (libc, winabi). The fact that all builds pull this in is a Cargo bug I hope they fix soon (apparently quite substantial changes are planned for this year).

But @newpavlov I would like your opinion on the code changes to the lib itself.

Looks good to me!