Contains Numerous Bug Fixes

Again this is Pre-Production ... AI still not taken into account

Other Features such as CoCo, Refixes, Call/Put etc are likewise not
modeled yet.

These should belong to the JDBinomialNode class if they are node
specific. We likely need another pkg to abstract these features as well
as keep track of when the Bond is callable/puttable eligible for
Makewhole etc. Then the node can simply call these interfaces to
determine value.