now made on our own DECODE CI

Something fails even without changes, due likely to emscripten docker
or travis system changes. This is too undeterministic to rely upon so
we're moving the testing infrastructure over our own Jenkins based CI
for DECODE.

necessary since travis has some weird constraints on running scripts

also some cleanups in the code

now also building static, windows and js targets on travis,
includes fixes to static build (using musl from package),
release mechanism tested for binaries, tracking master branch

includes a small fix to extension loader,
also OSX doesn't likes inline functions.