darshan-logutils now returns an error when encountering a log file
with a module version number greater than what the library was
built with. all utilities were also updated to account for this
modification

mount information is now sorted in order of descending mount
point lengths to fix a bug in matching file names to mount
points. the longest mount point string which matches the file
name is the corresponding mount. this change requires slight
changes to the darshan-logutils API, but does not modify the
log file format