Flexo is a library that gives one flexibility in referring to
method names.  Right now it translates names of the form

myMethodName

to the form

my_method_name

so that people like the author, who hates underscores, don't have to use them.

Flexo is implemented by modifying class Object's method_missing.  So, for it
to work, Flexo must be required before anything is instantiated.
