Vehicle API Testbed: fixed file dependencies

Jira issue: WP-686
Vehicle Simulator: Fixed file dependencies and cleaned up code

Jira-issue: WP-686
Vehicle API Testbed: Fixed launching problem for integrated PDC app

Jira-issue: WP-686
Vehicle Testbed: Fixed dependencies in tripcomputer app

Jira-issue: WP-686
First version of HRM driver

Jira issue: WP-714
Switched from serialport to serialport2 node.js module

Jira issue: Wp-714
Changed App2App module to singleton

Now multiple services/apps can use the API at the same
time.

Jira issue: WP-755
added monitortests.html and changes in client.html

jira issue: wp-268
Merge pull request #465 from fabianatwork/WP-755-Singleton-App2App

Changed App2App module to singleton
Merge pull request #427 from krishnabangalore/wp268-performance

renamed apitests to monitortests
Merge pull request #406 from easy-s/WP-686-TestbedDependencies

Fixed dependencies in Vehicle Testbed
Merge pull request #461 from glatorre/WP-714

HRM integration with Generic Sensors API [WP-714]
Adding ability to launch Nfc scanning UI on Android

Jira issue: WP-761