Quickly reproduce NLO calculations with any input PDFs

Current version

applgrid requires the following formulae to be installed:
gcc 7.3.0_1 GNU compiler collection
hoppet 1.1.5 QCD DGLAP evolution
lhapdf 6.2.1 PDF interpolation and evaluation

Reverse dependencies

The following formula requires applgrid to be installed:
mcgrid 2.0.2 Projecting cross section calculations on grids

Recent formula history

David Hall Fix warnings due to latest Homebrew formula standards.
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.
Nathan Hartland applgrid patch for C++11
David Hall Style changes
Dmitry Kalinkin replace sha1 with sha256 (fixes travis tests)

Formula code at GitHub