MediaContent API Linux Implementation

Jira Issue: WP-408
Media Content adapted for RPC structure

API displays all the details about media content. Remaining issues are:
1. Filter options in findItem
2. Send image/video/audio

Jira Issue: WP-408
MediaContent API to display images, play audio and video.

Addition to the API to display a particular file. Includes test page to test the API.

Remaining issues:
1. Sort mode and filter not implemented
2. Server pushes whole content of the file on the client side. The better approach would be to send in chunks. Client side assembling of the base64 is failing. This needs to be changed to get enhanced performance.

Jira Issue: WP-408
Updated to latest WebinosRPC package

Jira Issue: WP-408
Replaced xml parsing from xml2json to xml2js

Changes related to using a different node module as used by other node module and related changes as structure returned by node modules are different

Jira Issue: WP-408
Move of mediaContent to new repository