Removed the old standard environment and view engine as they are now superflous
Updated dependencies
Path updates

* `Micro\Util\TestCase` removed - this is superceded by the `Micro\Testing` namespace
* `Micro\Util\DumbEnvironment` renamed - this is now in keeping with the `Micro\DefaultHandler` convention
Renamed DumbEnvironment in test case
Initial commit of the Testing section of the library