bumping versions of terser, qunit, and coveralls dependencies, updati…

…ng build script for (much) newer terser

renaming from 'fpo' to 'FPO', fixing build-status link

fixing wrong qunit package

updating qunit

added 'terser' for minification

tweaking editorconfig again

updating devdependency

adding .editorconfig

tweaking npm coverage script

tweaks to fix docs and test harness, updating devdependencies