* Install react and react-dom along with react-scripts

- Install react, react-dom and react-script in a same time
- Move react-scripts to devDependencies.

* Check if react, react-dom has been already installed

- To backward compatibility with old CRA’s cli
- In case old CRA doesn’t install react, react-don along with
react-scripts

* Use packageName to find script dependency

- use packageName to find dependency
- fix pathExists.sync

* Check dependencies.react in package.json instead of actual files

* Process exit when dependencies not found

- Show error and exit when dependencies not found.
- Log install show custom package name

* Remove template string

* Install dependencies if template is preseted

* Remove dangling comma

Resolves #1239