Replace the native dump() function with a wrapper function that takes an optional...

Replace the native dump() function with a wrapper function that takes an optional 2nd parameter for log level (defaults to debug)
Log level: 0 None, 1 Error, 2 Warning, 3 Info, 4 debug
A global _dump_level variable gets consulted when the function is used.  The default is 2, Warning.
So by default, until we start changing things, this will suppress most of the existing dump statements.  Some are slipping through the cracks based on when the function replacement happens, but I'm happy with it.  We also prepend the dump msg with a label for the log level.

_dump_level could be locally customized with server/skin/custom.js

git-svn-id: svn://svn.open-ils.org/ILS/trunk@19323 dcc99617-32d9-48b4-a31d-7c20da2025e4