Coding Style + Metrics Limit

changes

• move to ES6 syntax
  • main file in package.json should point to dist/ folder
  • added babel to dependencies to get git postbuild hook running
• apply latest eslint + airbnb-base code styling
• [minor] add metricsLimit option to limit the amount of unique metrics that can be sent out

v0.2.6

fixes

v0.2.5: Merge pull request #2 from blogfoster/feature/black_whitelisting

add blacklisting and whitelisting