golang version 1.4.2 and drop support for 1.3
golang version 1.4.2 and drop support for 1.3

support for 1.3 doubles work/time spent on travis without apparent value

mjbrender/snap,mkleina/snap,mjbrender/snap,mkleina/snap,intelsdi-x/snap,lynxbat/foo,lynxbat/foo,intelsdi-x/snap,sandlbn/snap,sandlbn/snap