Update Travis to test against Go 1.4.3 and Go 1.5.2 as these are the latest stable releases in the 1.4.x and 1.5.x.
Update Travis to test against Go 1.4.3 and Go 1.5.2 as these are the latest stable releases in the 1.4.x and 1.5.x.

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