Add info types and special arguments to help, other minor fixes.
filesystem: use special argument
cpu: start to implement using special argument
cpu: now implements cpu specification
 * returns error if invalid cpu given
 * defaults to 'cpu' which is total
test: move static testfiles to test/static
load: add core count to output for clarity
fix: remove start=None from disk()
fix: memory was not returning 'extra'
implement capturing of ssh output for testing