Explicitly get tunda-rendering-ogre.json from install directory. This might get skewed if Tundra is started from a browser with tundra:// and get it from the processes working dir.
CoreJsonUtils: Fix line number error reporting for ParseFile when comment lines are removed before parsing.
Implement support for --config JSON files. Added tundra.json (replaces plugins.xml) and tundra-client.json (replaces viewer.xml). Both XML and JSON are supported by --config, this does not break anything. You can cross reference XML from JSON configs and vice versa with embedded --config. TODO: If this JSON looks good to people we need to replace the default 'plugins.xml' from code with tundra.json.