Adds a set of helpers for GKE setup and microservices installation

[chroto]

This adds three _helpers scripts:

• gke_boilerplate.sh: For fresh GKE clusters. Sets up kubectl contexts, installs tiller, generates a TLS cert, and uploads as a kube secret to both clusters
• install_microservices.sh: Run after gke_boilerplate.sh. Installs fluentd DS and microservices to both clusters. Waits for services and ingress to become healthy
• cleanup_microservices.sh: Deletes all helm charts for fluentd and microservices

Both gke_boilerplate.sh and install_microservices.sh should be run after sourcing workstation.env

[jmound]

(as discussed)

• Update the readme to include running this
• Add a note about installing realpath or remove it as a dependency
• Possibly rename gke_boilerplate.sh
• Add a description in the comment header of each scripts
• Let's consider adding a reset script to run before gke_boilerplate.sh, so that one can get in to a state in which running the script succeeds without error.

[jmound]

These changes were written for v1. If needed, we can reopen this as a merge in to a long-running v1 branch.

The current set of helper scripts address these needs with the exception of cleanup scripts and documentation, which is a (currently) open issue (#47 )