hdf5_ep

[svn-r6797] Purpose:
    Feature

Description:
    Added new flag to the H5pubconf.h file --- NO_SHARED_WRITING
    (H5_NO_SHARED_WRITING). It's only defined for CodeWarrior and should
    never be defined for other platforms unless the "open()" bug that CW
    has shows up on other platforms.

Platforms tested:
    Verbena. Configure only, so no need for full tests.

Misc. update: