upgrade to support nodejs v0.10.x

:Release Notes:
pmlog addon upgrade to support nodejs v0.10.x and comply with PmLogLib API changes

:Detailed Notes:
added binding.gyp as required by new nodejs for building addon
removed deprecated log levels
updated test script to include Context and Console APIs

:Testing Performed:
Tested with the test script on TV. Verified that all console.* messages are logged in /var/log/legacy-log and context.* messages are logged in /var/log/messages

:Issues Addressed:
[GF-2506] Upgrade NodeJS to v0.10.4
[GF-2576] nodejs-module-webos-pmlog: Comply with Node.js C/C++ Addons
[GF-9255] nodejs-module-webos-pmlog: Remove deprecated log levels

Open-webOS-DCO-1.0-Signed-off-by: Vinay Ramachandra <ramachandra.vinay@lge.com>

Change-Id: I5defdb84be3ebf9d250851fc07158514fd3907d0
Reviewed-on: https://g2g.palm.com/2882
Reviewed-by: Build Verification
Reviewed-by: Gayathri Srinivasan <gayathri.srinivasan@lge.com>
Reviewed-by: Keith Derrick <keith.derrick@lge.com>
Reviewed-by: Patrick Roberts <patrick.roberts@lge.com>
Reviewed-by: Mark Bessey <mark.bessey@lge.com>
Tested-by: Mark Bessey <mark.bessey@lge.com>