FIX: Documentation for for 0.14.1 change log
Change log is missing some key words on changes to StataReader and StataWriter.

A small omission to the 0.14.1 docs where I left off the class names.
 hmm, these are not normally regenerated. when @jorisvandenbossche is back he can do if necessary
 Just saw the 0.15-dev docs today and noticed the omissions.  Figured I put the option out there.
 np. thanks.
 In any case, merging this so it is fixed in future docs. I will put in on my todo list to also update the current stable docs (but will be something for next week at the earliest)
