Update MySQL ODBC driver installation instructions on Mac
Move InterruptSolution test to solver_test.
Move Error into a separate header.
Implement C++11-like steady_clock.
Reset stop flag only after the signal handler has been set because the test code checks this flag to see if the signal handler has been set or not.
Use steady_clock and a few other corrections in jacop.
Add error tests.
Add jacop tests.
Clean gecode tests.
Add Windows implementation of steady_clock.