Also adds implicit conversion configuration option to Type constructor,
and institutes a numbers-only bundle, and supports argument matching
with implicit conversions.
Still need to test that a behavior that invokes implicit conversion ends up
with the conversion operation as a dependency (and so regenerates itself if
the conversion changes).
* Defines a BooleanT type
* adds options to the Type constructor, so far just to allow conversions
from other types
* renames Number type to NumberT
* records the name of types, and puts the name in the string representation
* defines a conversion fron BooleanT to NumberT, specified to be automatic
* stub code for automatic conversions, not yet complete
* BooleanT not yet added to nanomath
Checked that the new facilities do not disrupt the prior behavior on numbers.
