Use Angular CLI instead of ngm for building

Some commands:

npm run build      - to build the library.  Output is in dist/ng2-file-upload/.
npm run test       - to run tests.  Coverage report is in coverage/ as before.
npm run demo.serve - to build demo application and serve it through browsersync
npm run start      - to run demo application using `ng serve`.  Requires the library to be built and linked first.

test/tsconfig.json

@@ -0,0 +1,22 @@
+{
+  "compilerOptions": {
+    "experimentalDecorators": true,
+    "module": "esnext",
+    "moduleResolution": "node",
+    "target": "es2015",
+    "outDir": "./out-tsc/spec",
+    "types": [
+      "jasmine",
+      "node"
+    ]
+  },
+  "files": [
+    "../scripts/typings.d.ts",
+    "test.ts",
+    "../scripts/polyfills.ts",
+  ],
+  "include": [
+    "../src/**/*.spec.ts",
+    "../demo/src/**/*.spec.ts"
+  ]
+}