header cleanup
net NumericalVariety -- small fix; the use of NAG%option abandoned; several foolproofing functions added (NAG)

value("NumericalAlgebraicGeometry$"|OptionName) is _not_ the same as
NumericalAlgebraicGeometry$OptionName
NAG/README and NAG/SYSTEMS
started reorganization of code
changed examples of NAG dealing with nonreduced schemes
Merge pull request #61 from antonleykin/NAG

NAG