[feature-req] watch tests and auto-reload on change (like chimp); Don't shutdown the browser

#### What are you trying to achieve?
I'm trying to get a realtime feedback for quicker test development cycle. Just like chimp where:
1. Browser stays open after tests are run
2. Tests are re-run when the test files change
3. auto manage selenium server and browser drivers
4. Auto installs dependencies

#### What do you get instead?
No realtime feedback on test writing
1. Browser shuts down after each run
2. Have to manually re-run tests
3. Need to start selenium manually
4. Need to install helpers manually (even though it's mentioned during init)

> Provide console output if related. Use `--verbose` mode for more details.

```bash
# paste output here
```
> Provide test source code if related

```php
// paste test
```
### Details

* CodeceptJS version: 0.5.1
* NodeJS Version: v6.10.2
* Operating System: win 10 pro x64
* Protractor || WebDriverIO || Nightmare version (if related): webdriverio: 4.6.2
* Configuration file:

codecept.json
```
{
"tests": "./feature/*.js",
"timeout": 10000,
"output": "./output",
"helpers": {
"WebDriverIO": {
"url": "http://localhost",
"browser": "chrome",
"restart": true,
"windowSize": "maximize",
"timeouts": {
"script": 60000,
"page load": 10000,
"implicit" : 5000
}
}
},
"include": {
"I": "./custom-steps/steps_file.js"
},
"bootstrap": false,
"mocha": {},
"name": "shaadi-try"
}
```

```js
# paste suite config here
```