Fix wrong use of include

And wrong url in Brokkr update

New Airflow environment variables creation

• A new way of doing environment files, rather than env variables that
  create env files
• Fix update url (formerly judoole repo)
• Cut lines of code with override variables

Fix typo in GOOGLE_DEFALULT_PROJECT

Minor fix for typo in GOOGLE_DEFALULT_PROJECT

Install script download same version of help plugin

v0.2.2

Make install script use version for help.mk

Fix install script and brokkr.mk

• Install script made wrong reference of help plugin
• brokkr.mk did use a wrong variable for the deletion of the sentinel

New versioning

• We now version in this manner BROKKR_PLUGINS := airflow/airflow@34b389a help/help@c09a208
• Removed option of http plugins.
• Updates on Airflow plugin

v0.1.0

This is the first release of a working version.
There are many issues and lacking documentation, but the tool works to it's main purpose.