v0.5.0

• updates documentation (e845bd5)
• changes d3plus-release to use d3plus-build internally (081f35d)
• updates documentation (1b0ff7a)
• [breaking] removes d3plus-locale script (8260d52)
• fixes syntax in env.js (646e7d4)
• d3plus-env now adds module pointers to package.json (16b94e4)
• adds es/ to gitignore (356b327)
• adds src/ and test/ to npmignore (4519ed6)
• adds module transpiling to enable tree-shaking (d1b9d19)
• updates to rollup v0.52.3 (closes #48 and closes #50) (daf7f7f)
• adds import.js src file for testing full builds (c42e5fa)
• cleans up unicode test (4642573)
• renames test src pipe.js to string.js (3763fad)