Updated release notes with a comment acknowledging the contribution f…

…rom Greg Sjaardema at #328

RELEASE_NOTES.md

@@ -5,10 +5,14 @@ Release Notes       {#RELEASE_NOTES}
 
 This file contains a high-level description of this package's evolution. Releases are in reverse chronological order (most recent first). Note that, as of netcdf 4.2, the `netcdf-c++` and `netcdf-fortran` libraries have been separated into their own libraries.
 
-> Note: The combination of netCDF-C library versions earlier than 4.4.1 and libhdf5 1.10.0+ should be avoided, as they will result in binary files not readable by systems using earlier libhdf5 versions.
+## Important Notes
+
+* **The combination of netCDF-C library versions earlier than 4.4.1 and libhdf5 1.10.0+ should be avoided, as they will result in binary files not readable by systems using earlier libhdf5 versions.**
 
 ## 4.4.2 - TBD
 
+* [Enhancement] Incorporated an enhancement provided by Greg Sjaardema, which may improve read/write times for some complex files.  Basically, linked lists were replaced in some locations where it was safe to use an array/table.  See [Pull request #328](https://github.com/Unidata/netcdf-c/pull/328) for more information.
+
 ## 4.4.1.1 - November 21, 2016
 
 * [Bug] Fixed an issue where `ncgen` would potentially crash or write incorrect netCDF4 binary data under very specific circumstances.  This bug did *not* affect data written on 32-bit systems or by using the netCDF library; it was specific to `ncgen`.  This would only happen when writing a compound data type containing an 8-byte data type followed by a 4-byte data type *and* the 4-byte data type was not properly aligned; this would *possibly* result in incorrect padding. This did not affect 32-bit systems, or data written directly by the library.  See [GitHub #323](https://github.com/Unidata/netcdf-c/issues/323) for more information.