Improved Installation

• Installation allows optional local storage of whales distributions, so that one can call importwhales even when offline.
• The template folder now contains all relevant files (incl. whales configuration files).
• The customisable process scripts for a project (build, test, clean) are now stored in a subfolder ./scripts, as per the standard of golang

NOTE: Due to changes in the importwhales script, one should overwrite any previous copies of this file in ones local binaries. This script is not fully backwards compatible with versions < 0.0.4.