Rewrite asymptotics results for general estimators

This commit moves the discussion of general asymptotic properties
of estimators into a single file.  It also converts the results into
paragraphs.
Rewrite bootstrap text and add Sweave code

This commit rewrites the bootstrap material to use paragraphs
and coherent trains of thought instead of a loose outline form.
The commit also moves the example code into an Rnw (sweave) file
so that it generates graphs on the fly.