feat(position): export position service from index of the position fo…

…lder

BREAKING CHANGE:
Before:
```
import {Positioning} from 'angular2-bootstrap-confirm/position/position';
```

After:
```
import {Positioning} from 'angular2-bootstrap-confirm/position';
```

README.md

@@ -37,7 +37,7 @@ Then use it in your app on a component:
 ```typescript
 import {Component} from '@angular/core';
 import {ConfirmOptions, Position} from 'angular2-bootstrap-confirm';
-import {Positioning} from 'angular2-bootstrap-confirm/position/position';
+import {Positioning} from 'angular2-bootstrap-confirm/position';
 // Or if you're already using the @ng-bootstrap/ng-bootstrap module
 // import {Positioning} from '@ng-bootstrap/ng-bootstrap/util/positioning';
 // or if you're using the ng2-bootstrap module
@@ -89,7 +89,7 @@ You may also find it useful to view the [demo source](https://github.com/mattlew
 
 ### Usage without a module bundler
 ```
-<script src="node_modules/angular2-bootstrap-confirm/position/position.js"></script>
+<script src="node_modules/angular2-bootstrap-confirm/position/index.js"></script>
 <script src="node_modules/angular2-bootstrap-confirm/dist/umd/angular2-bootstrap-confirm.js"></script>
 <script>
     // position service available as ng2BootstrapPosition.Positioning

package.json

@@ -10,7 +10,7 @@
     "build:demo": "webpack -p",
     "build:umd": "webpack --config webpack.config.umd.js",
     "build:dist": "npm run build:umd && npm run ngc",
-    "build:position": "webpack --config webpack.config.position.js && cp ./node_modules/@ng-bootstrap/ng-bootstrap/util/positioning.d.ts ./position/position.d.ts",
+    "build:position": "webpack --config webpack.config.position.js && cp ./node_modules/@ng-bootstrap/ng-bootstrap/util/positioning.d.ts ./position/index.d.ts",
     "test": "karma start",
     "test:watch": "karma start --watch",
     "build:clean": "del ./dist ./position",

src/position.provider.ts

@@ -5,7 +5,7 @@ import {Injectable} from '@angular/core';
  *
  * ```
  *  // if not also using the @ng-bootstrap/ng-bootstrap module
- * import {Positioning} from 'angular2-bootstrap-confirm/position/position';
+ * import {Positioning} from 'angular2-bootstrap-confirm/position';
  *  // if already using the @ng-bootstrap/ng-bootstrap module
  * import {Positioning} from '@ng-bootstrap/ng-bootstrap/util/positioning';
  * import {Position} from 'angular2-bootstrap-confirm';

webpack.config.position.js

@@ -1,7 +1,7 @@
 module.exports = {
   entry: '@ng-bootstrap/ng-bootstrap/util/positioning',
   output: {
-    filename: 'position/position.js',
+    filename: 'position/index.js',
     libraryTarget: 'umd',
     library: 'ng2BootstrapPosition'
   },