Add support for parsing NamespacedJson in Json compiler. Closes #44

src/compilers/json.compiler.ts

@@ -1,6 +1,8 @@
 import { CompilerInterface } from './compiler.interface';
 import { TranslationCollection } from '../utils/translation.collection';
 
+import * as flat from 'flat';
+
 export class JsonCompiler implements CompilerInterface {
 
 	public indentation: string = '\t';
@@ -18,7 +20,15 @@ export class JsonCompiler implements CompilerInterface {
 	}
 
 	public parse(contents: string): TranslationCollection {
-		return new TranslationCollection(JSON.parse(contents));
+		let values: any = JSON.parse(contents);
+		if (this._isNamespacedJsonFormat(values)) {
+			values = flat.flatten(values);
+		}
+		return new TranslationCollection(values);
+	}
+
+	protected _isNamespacedJsonFormat(values: any): boolean {
+		return Object.keys(values).some(key => typeof values[key] === 'object');
 	}
 
 }