add babel and a build step

[patotoma]

fixes #8

[codecov-io]

Codecov Report

Merging #9 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master     #9   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           2      2           
  Lines          62     62           
=====================================
  Hits           62     62

Impacted Files	Coverage Δ
src/main.js	100% <ø> (ø)
src/lib.js	100% <100%> (ø)

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[coveralls]

Coverage remained the same at 100.0% when pulling b06a879 on patotoma:master into 2a7f269 on meeDamian:master.

[coveralls]

Coverage remained the same at 100.0% when pulling b06a879 on patotoma:master into 2a7f269 on meeDamian:master.

[meeDamian]

Thank you.