Also run travis build on node.js 4 & 5.
Also run travis build on node.js 4 & 5.

rlugojr/mocha,hoverduck/mocha,Khan/mocha,aaroncrows/mocha,JohnnyEstilles/mocha,boneskull/mocha,hoverduck/mocha,nightwatchjs/mocha-nightwatch,Khan/mocha,pumpupapp/mocha,villesau/mocha,ELLIOTTCABLE/mocha,sul4bh/mocha,villesau/mocha,rlugojr/mocha,beatfactor/mocha,boneskull/mocha,Shyp/mocha,hoverduck/mocha,beatfactor/mocha,rlugojr/mocha,beatfactor/mocha,Hacker0x01/mocha,sul4bh/mocha,menelaos/mocha-solarized,aaroncrows/mocha,tswaters/mocha,Hacker0x01/mocha,jjoos/mocha,santiagoaguiar/mocha,adamgruber/mocha,ELLIOTTCABLE/mocha,santiagoaguiar/mocha,jjoos/mocha,villesau/mocha,apkiernan/mocha,ryanshawty/mocha,Shyp/mocha,menelaos/mocha-solarized,menelaos/mocha-solarized,pumpupapp/mocha,JohnnyEstilles/mocha,apkiernan/mocha,Shyp/mocha,Hacker0x01/mocha,igwejk/mocha,jjoos/mocha,santiagoaguiar/mocha,outsideris/mocha,outsideris/mocha,tswaters/mocha,Khan/mocha,ryanshawty/mocha,apkiernan/mocha,mochajs/mocha,tswaters/mocha,pumpupapp/mocha,mochajs/mocha,ELLIOTTCABLE/mocha,mochajs/mocha,sul4bh/mocha,hoverduck/mocha,boneskull/mocha,JohnnyEstilles/mocha,igwejk/mocha,adamgruber/mocha,adamgruber/mocha,ryanshawty/mocha,nightwatchjs/mocha-nightwatch,nightwatchjs/mocha-nightwatch,aaroncrows/mocha