include 17.1 in travis config, only use latest releases of older versions
include 17.1 in travis config, only use latest releases of older versions

jasonjli/mochiweb,vinoski/mochiweb,danogwok/mochiweb,ubf/mochiweb,danogwok/mochiweb,robertkowalski/mochiweb,tsingpan/mochiweb,jasonjli/mochiweb,ubf/mochiweb,tsingpan/mochiweb,vinoski/mochiweb,robertkowalski/mochiweb