This change eliminates our dependencies on the SDK repo. Now that
SDKs are comprised solely of pulumi/pulumi artifacts, a separate repo
isn't required. This allows us to simplify some of the distribution.
The install.sh script is modified slightly, to permit overriding the
default install location using $PULUMI_INSTALL_PATH.
After the move to stop including packages in the SDK, we no longer
published an SDK per build. This corrects this. Since the only things
in the SDK today are the language plugins and the CLI itself, we can
publish an SDK per build from pulumi/pulumi.
This change re-uses the existing infrastructure we have in
pulumi/sdk.
Fixes#1076
For some tools we used, like `dep` and `gometalinter` we were just
calling `go install` which caused us to pick up whatever was in `HEAD`
at that time. Now, we move to a model where we install fixed versions,
which will change per milestone.
While doing this, I changed the way our .travis.yml file runs
everything to move as much as possible out into scripts and do so in a
way that allows us to share as much common logic across our
repositories.
