Fixed Dashboard v0.0.1 w/ Polymer3 + Webpack (kubeflow#2576)

* Multiple issues tackled:
- Fixed webpack for windows (components/ is not a valid path in windows)
- Spacing and semicolons matched to old-codebase
- Added cross-platform support to npm run targets
- Added missing dep (babel/polyfill)
- Dashboard build version is now corrected and hover will reveal kubeflow vs Dashboard versions
- Pug fixed to match syntax for empty-value attributes
- Updated webpack for readability

* Added babel-polyfill to runtime deps rather than dev deps

* [Windows-only] Color coded all make output, Tag check added, failures now have messages, also dirty git output now has a warning during build

* Updated new dashboard reference :v20190227-v0.4.0-rc.1-176-g738de035

* Fixed Multiple changes:
- Server port fixed to 8082 which is what is needed for GKE deployment
- Refactored some code

* Final working state for new image

* TS Changes

* Build updated to match latest :v20190301-v0.4.0-rc.1-183-g07eecd2f

* Migrated dev dependency to correct location

* Uncommented linter, fixed PR comments from @prodonjs

components/centraldashboard/Dockerfile

@@ -8,6 +8,6 @@ COPY webpack.config.js *.json ./
 
 RUN npm install && npm run build && npm prune --production
 
-EXPOSE 8080
+EXPOSE 8082
 
 ENTRYPOINT ["npm", "start"]