added support for wildcard XInclude in XMLFileBacked
abstracted similar digit range classes in POSIXUsers/GroupPatterns into Bcfg2.Utils
moved common file locking code into Bcfg2.Utils
Metadata: allowed setting global default authentication type
Metadata: process default client bootstrap mode properly
better Executor class for client tools
added docs for Bcfg2.Utils
extended usage of Executor class, added client-side timeout options
doc: added wildcard xinclude docs that were lost in merge