Fully automated implementation of the Open Loops algorithm

Current version

openloops requires the following formulae to be installed:
gcc 7.3.0_1 GNU compiler collection
scons 3.0.1 Substitute for classic 'make' tool with autoconf/automake functionality

Reverse dependencies

The following formula requires openloops to be installed:
sherpa 2.2.4 Monte Carlo event generator

Recent formula history

David Hall Fix warnings due to latest Homebrew formula standards.
David Hall openloops: add bottles [skip ci]
David Hall openloops: fix audit
David Hall Travis-CI uses brew test-bot Copied .travis.yml from brew-tap-new script. This should make for quicker testing, because only the edited formula is tested. Also moved formulae to Formula folder.
David Hall Style changes

Formula code at GitHub