Merged code from GitHub.  Synching up repos.
Merge branch 'master' of https://github.com/kyle-github/libplctag

Too many copies of repo on local drive.  Trying to merge them to the latest.
It is necessary to have the expected response data be a multiple of
some other sizes than 4 bytes.  In the case of reading an array of
strings, it is 88 bytes.  Use the element size as the rounding unit
until we can figure out just what the PLC is doing.