improve regress tester, add -l option to make it use installed libraries, have it time how long compiling and running takes, allow selection of tests to run via regexps on the command line
improve regress tester, add -l option to make it use installed libraries, have it time how long compiling and running takes, allow selection of tests to run via regexps on the command line

darcs-hash:20061120222330-1a7c6-4f235fc64bce8154cad256468818283982532d88

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