vchoi_fork

[svn-r11761] Purpose:
Unstable format version marker.

Description:
This marks the Check in baseline for compact group revisions,
which radically revises the source code for managing groups and object headers.
Earlier versions (1.7.52 or earlier) have the original format.  This version
and later have the unstable format until further notice.

Platforms tested:
h5committested.