Extracting now and cmd package in order to fix relative import issues
#19: capturing ccall dependencies
#19: fixing capture for functions without return
#19: capture inter dependencies between params
#19: capture usages
#19: Storing slicing
#19: store value and time
#19: fixing some capture issues and trying to improve speed
#19: export slicing to prolog
#19: prolog rules for slicing
closes #19: releasing version 0.5.0 with program slicing