Restructured Test Suite

- separated tests into e2e and unit directories
- created configs directory structure to support test framework
- added/modified `npm run test`, `npm run test:unit` and `npm run test:e2e` to target all, unit and e2e tests respectively
- modified some of the test names to be more descriptive

New structure of the Test Suite has following directory tree:

```
tests
├── configs
│   ├── env.js
│   └── modules
│       ├── clock
│       │   ├── clock_12hr.js
│       │   ├── clock_24hr.js
│       │   └── clock_showPeriodUpper.js
│       └── helloworld
│           └── helloworld.js
├── e2e
│   ├── env_spec.js
│   └── modules
│       ├── clock_spec.js
│       └── helloworld_spec.js
└── unit
    ├── functions
    │   └── cmp_versions_spec.js
    └── global_vars
        └── root_path_spec.js
```

CHANGELOG.md

@@ -17,6 +17,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 - Show the splash screen image even when is reboot or halted.
 - Added some missing translaton strings in the sv.json file.
 - Run task jsonlint to check translation files.
+- Restructured Test Suite
 
 ### Added
 - Calendar-specific support for `maximumEntries`, and ` maximumNumberOfDays`
@@ -37,6 +38,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 - Add test e2e helloworld
 - Add test e2e enviroment
 - Add `chai-as-promised` npm module to devDependencies
+- Basic set of tests for clock module
 
 ### Fixed
 - Update .gitignore to not ignore default modules folder.