Bug 1103031 - switch over to using base-test and base-build images
bug 1103031 - create artifacts directory in tester
Merge pull request #37 from gregarndt/bug_1103031_switch_docker_image

Bug 1103031 - switch over to using base-test and base-build images
Bug 1098406: Fix gaia repository path.

A commit in the mozilla-central repository [1] broke the gaia URL
repository URL construction code.

We now make sure our code works independent of the leading slash
presence.

[1] http://hg.mozilla.org/mozilla-central/rev/f3782f5c2710
Bug 1102085: Use "mach environment" to extract the object directory.

If "topobjdir" is None, use default object directory.