Most information about this package can be obtained from the README. 
This file only highlights what's new in this release(2.5).

1. Fixed a bug on handling the 2 dimensional latitude and longitude HDF-EOS5 grids.
2. Correctly handled the HDF-EOS5 "Unlim".
3. Fixed memory leakings discovered in the testsuite.
4. Provided static binaries for 64-bit Linux CentOS 6,CentOS 7 and MacOS 10.9,10.10,10.11 and 10.12.
   Static binaries for 32-bit Linux and MacOS 10.8 are no longer provided.