relax SVN archive

Fixes for the __atom_index() method.

Created the __atom_index() method to find the atom index corresponding to an atom number.

Modified the __parse_pdb_record() method to parse CONECT records.

Improved the consistency_tests system testing script.

Added code to connect atoms via CONECT records in the internal PDB reader.

Added a copyright to the consistency_tests script.

Bug fix for the loading of multiple files.

Each time a new file was loaded, all its atoms would be appended to all other presently loaded
structures. This would cause large slow downs of the atom_loop() function, and a few other
problems. Now structures are referenced by structure index rather than model number.

Added a script for consistency_tests system testing.

This one is, basically, a copy of the sample script. Changes are thus needed for it to work as a
system test script.

Added the use of a script for consistency_tests system testing.

Changed the test suite reference value for eta so the test passes after the equation modification.

This change follows the one for r6665 (http://svn.gna.org/viewcvs/relax?rev=6665&view=rev) and had
already been made on the 1.2 line, but was also needed on the 1.3 line. See r6611
(http://svn.gna.org/viewcvs/relax?rev=6611&view=rev) for details.