Build updates

[balasan]

Ref ussue: #25

• remove libraries from build
• remove babel-polyfill
• add babel-plugin-transform-runtime plugin to webpack build in place of babel-polyfill
• add source maps to dev build
• add dev start script that watches files for changes to package.json
• remove dev folder from .gitignore

[balasan]

not sure if i should be making PR to 'develop' or 'master' - let me know if develop is better and I'll update

[tarrencev]

This is great. Unbundling of package dependencies is inline with best practices. Bundling should be left to the application depending on Drizzle.

I would however suggest leaving dist in the .gitignore. Or, at least, moving that change to a separate PR since the changes are independent.

[OnlyOneJMJQ]

Agree with @tarrencev --great stuff! Thank you.