bug fixes
substituted hize_t array index variables for int
stack corruption in the h52gif reading routine, wrote a new routine
shell script for gif tests, added check of program return value
enabled the gif test script
tested: linux pgcc, solaris, linux 64
bug fix
a malloc call with an incorrect length caused several memory problems that ultimately corrupted a name passed in a list of arguments in the h52gif tool
allocated memory was not freed
tested linux
New feature
Add a tests script for h52gif tool. A simple script that just runs the
tool from a pre-saved HDF5 file and produces a gif file. A HDF5 test
generator program is also added
Note: the .am file needs further development, right now it is not
producing the test
