1.9.0 - imports, namespaces, more cjs flavour, slicing bundles

* added imports feature 
```
  "imports": ["my.namespace", "window"]
```
* wrapping everything in cjs function (from module scope __dirname/__filname is accessible)
* setting cutting points for modules
```
  "slice": {
    "node_modules/**/**":"dist/external.js"
  , "**/*.js": "dist/components.js"
  }
```
* expose modules within namespace
```
  "namespace":"my.awesome.example"
```
* reading configuration from external `re-define.json`
* creating flat folder structure as module names
* better coverage
* resolved issue with loading files bigger than 64KB