Use new HashMap / HashSet constructor
#37 Adapts to SDK fix.
function to execute a process takes now two distincts parameters.
`command` which is the name of the program to be run
`arguments` which is the argument list to be passed to this program.
Merge branch 'master' into declarative-syntax

Conflicts:
	source/ceylon/build/engine/console.ceylon
	source/ceylon/build/engine/dependency.ceylon
Repair all engine tests