Add an interactive prompt for password in authentication code.
Add an interactive prompt for password in authentication code.

Gets to the initial step of handling the case where this was not
initially provided.  This will need further extension/thought to
handle non-command-line tools though, still pondering how exactly
to tackle that.

adfernandes/pcp,adfernandes/pcp,wuliming/pcp,andyvand/cygpcpfans,edwardt/pcp,wuliming/pcp,edwardt/pcp,prasincs/pcp,wuliming/pcp,adfernandes/pcp,prasincs/pcp,tjanez/pcp,edwardt/pcp,tjanez/pcp,wuliming/pcp,aeg-aeg/pcpfans,andyvand/cygpcpfans,adfernandes/pcp,adfernandes/pcp,aeg-aeg/pcpfans,aeg-aeg/pcpfans,andyvand/cygpcpfans,aeg-aeg/pcpfans,tjanez/pcp,adfernandes/pcp,prasincs/pcp,tjanez/pcp,andyvand/cygpcpfans,wuliming/pcp,mbaldessari/pcp,mbaldessari/pcp,edwardt/pcp,edwardt/pcp,prasincs/pcp,andyvand/cygpcpfans,aeg-aeg/pcpfans,adfernandes/pcp,tjanez/pcp,andyvand/cygpcpfans,edwardt/pcp,wuliming/pcp,andyvand/cygpcpfans,mbaldessari/pcp,mbaldessari/pcp,wuliming/pcp,andyvand/cygpcpfans,edwardt/pcp,prasincs/pcp,aeg-aeg/pcpfans,tjanez/pcp,wuliming/pcp,mbaldessari/pcp,prasincs/pcp,prasincs/pcp,aeg-aeg/pcpfans,aeg-aeg/pcpfans,edwardt/pcp,prasincs/pcp,tjanez/pcp,tjanez/pcp,mbaldessari/pcp,adfernandes/pcp