Add handling for environment variable ORACLE_LIBRARY. ORACLE_LIBRARY should be set to a valid path to the libclntsh.so file, or to the filename itself if the path to the file is in the systems library search path for example: in LD_LIBRARY_PATH on Solaris systems or /etc/ld.so.conf on Linux systems.
This should allow much easier use of precompiled libraries on systems where the oracle install does not follow the normal directory layout.
The ChangeLog provides some sample configurations.