Merge pull request #29 from pschiffe/master

Basic hwinfo script
software: fixed regular expressions for matching nevra
allow multiplexer to have a fallback command
doc: documented new FALLBACK_COMMAND property
hardware: treat missing command as to list all
enhanced storage Makefile
Hardware: replaced Linux_ComputerSystem with CIM_ComputerSystem
Hardware: added cpu subcommand

Cpu subcommand displays basic information about processor.
Hardware: added memory subcommand

Memory subcommand displays information about memory.