Make a build with 'npm run build'

Closes #48
os compatable
tiny cleanups
use copyfiles
Merge pull request #92 from paulswartz/package-build

Make a build with 'npm run build'
adds deselectFeature event to trigger a rebind of a popup to a feature on info close
Merge pull request #97 from isaacchansky/gh-pages

adds deselectFeature event to trigger a rebind of a popup to a feature o...
Merge pull request #98 from paulswartz/gh-pages

fix shadow display
add html5shiv for IE support