Stop linkerd from creating folder during get.sh

Changelog for 0.1.8:

• PR #32 Fixes #31: add --wait global option to the install command by @aidun

This fixes an issue where some code that ran in get.sh created a .arkade folder owned by root.

sudo arkade update
# then do update.

# remove any old cached folders which are owned by root
sudo rm -rf ~/.arkade
sudo rm -rf ~/.helm

# For MacOS users
sudo rm -rf /Users/$(whoami)/Library/Preferences/helm/repositories.lock
sudo rm -rf /Users/$(whoami)/Library/Caches/helm/repositories.lock

# Then run it again

arkade version

# Shouldn't exist now, and when re-created will be owned by your user account
sudo ls -l $HOME/.arkade

Commits
9f4f0dc Stop linkerd from creating folder during get.sh by @alexellis
4def417 Fixes #31: add --wait global option to the install command by @aidun

Generated by Derek