Add comments indicating the shortcomings of the current implementations of
fseek and fsetpos.
Add SimpleWrapper-based error checking for clearerr, feof, ferror, and perror.
Implement SimpleWrapper-based error checking and recording for remove and
rename.

Enable interception for ftell, fgetpos, fseek, fsetpos, rewind, clearerr, feof,
ferror, perror, remove, and rename.