Changes 1.8.11:
Configuration
- Libtool version number is changed to 8.0.0 because there are API
  changes. See below for details.
- Mac OS X 10.7 (Lion) and 10.8 (Mountain Lion) uses clang/clang++ as the
  default C and C++ compilers.
- CMake minimum is now 2.8.10.
- A new tool, cmakehdf5, which is a build command script similar to
  buildhdf5 is added and is available in the bin directory.

Library
- The library can load filter libraries dynamically during runtime.  Users
  can set the search path through environment variable HDF5_PLUGIN_PATH
  and call H5Pset_filter to enable a dynamic filter.
- Added new API functions H5Dscatter and H5Dgather to scatter data to and
  and gather data from a selection within a memory buffer.
- The library now supports the data conversion from enumeration to numeric
  (integer and floating-point number) datatypes. See Issue HDFFV-8221.

Tools
- h5dump: added new option -O or -ddl to output the ddl text to a file. This
  is a complement to the -o or --output option, which redirects the data to
  a file.

(adam)