Your binaries for Linux don't work:
./neptuniumd: error while loading shared libraries: libboost_system.so.1.55.0: cannot open shared object file: No such file or directory
I'm using Kubuntu + some hacks
I think the .so.* is wrong, no file like that exists on my system.
P.S. It's Wily
Dont blame the dev lol. Install boost 1.55.
I run in ubuntu 14.04 server and debian 7 run smoothly.