Update the README - 2.0 requirements and wishlist items.
Update the README - 2.0 requirements and wishlist items.

These mention the pmgadgets/pmview code thats now available, and
minor wording updates here & there to reflect current thinking.

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