[release] Prepare for next development iteration

Change-Id: Ia703cb5a44b3717a7e7705db5a65f305880486b2
Renamed package & namespace from KwsMedia to kws-media-api & kwsMediaApi

Change-Id: I8266e76ba8c370aa155683211ede62a7ece59099
Info about how-to test

Change-Id: Ibc26294b706cdd7de4f05e0f7fd3bd12878267fd
Tests passing on Node.js

Change-Id: I77090e9edaa1b0f5f3c5411f83f22d652d1b946d
SessionID is mandatory on all messages

Change-Id: I3549464865766af7e3278dac1689b951cfca16b2
Examples using new kwsMediaApi namespace and new public library location

Change-Id: I9e0ab3fc7ae85e994ad35c796adb527d2d8f9504
Using specific version for grunt-browserify

Change-Id: I9d29f3e2c49ba2f40a663003f0cbfdaed4386c6c
test files are not api documentation

Change-Id: Ieebd3d21edebac9be096e158afec527c48bf87a4
[release] 4.2.1

Change-Id: I926cf517ca5d06c82f516d73c30cb27b87b978c1