Implements the application decoupling as discussed in #913.

Excludes karma.conf.js, protractor.conf.js and test-main.js from the copy
build task, so that those files will not be copied over to /dist/** directory.
Furthermore also excludes the tsconfig.json from this copy process, as it was
copied over before too.

Updates the protractor configuration and associated gulp task.

Adds a e2e.singleRun gulp task to the gulpfile to leave the script
in the package.json more compact. Also updates the README to include
the new folder and file structure.

- Implements the application decoupling as discussed in #913.
- Excludes karma.conf.js, protractor.conf.js and test-main.js from the copy
build task, so that those files will not be copied over to /dist/** directory.
Furthermore also excludes the tsconfig.json from this copy process, as it was
copied over before too.
- Updates the protractor configuration and associated gulp task.
- Adds a e2e.singleRun gulp task to the gulpfile to leave the script
in the package.json more compact. Also updates the README to include
the new folder and file structure.

Updates the package.json and gulpfile.ts to fix the issue of running
the e2e.singleRun task

Adds a separate package.json for the sources in src/browser.