[travis] Remove node v0.4 testing
[travis] Remove node v0.4 testing

maxogden/director,webx32/director,lzhengms/director,stonegithubs/director,pocketjoso/director,mylikes/director,cpg1111/director,pocketjoso/director,vitalsource/director,ks3dev/director,fadeit/director,fadeit/director,sheldonzf/director,tanzhihang/director,flatiron/director,GerHobbelt/director,mylikes/director,pandoraui/director,GerHobbelt/director,stonegithubs/director,lzhengms/director,kiritoe/director,andradedev/director,pandoraui/director,vitalsource/director,cpg1111/director,sheldonzf/director,webx32/director,meleslilijing/director,tanzhihang/director,andradedev/director,ks3dev/director,kiritoe/director,meleslilijing/director