* Define the log levels defined in the JAVA workflow tools as a R List
* support TEXTUAL logging levels
* use stop() in cases of grave errors. For example: unable to create the logger or load the logging dependency
* support case when logging is NULL/not defined

Change-Id: Ibeb024eb3a7dd0fb1bb0cdedc5cea96cf17bf8af
* Rebuild the logging framework with the support for "Textual log levels"

Change-Id: I355d06ae5824c7f1a6ee2a3f078af6a5e8d52534
Build instructions for the logging framework

Change-Id: I28ab0f540bff0201a08ff38f140c49f395241796
additional ignore type

Change-Id: I3dfece81fd6047397fdc8c31baeecb66304f0d9d
* Updated logging readme with build and installation instructions
* logging commons R script updates with support for text levels of logging
* repackage and rebuild logging commons R package for installation

Change-Id: Ib27ed18fa7bfa3659674ebf7bbf7d9c7c0a6166f