Move all general purpose scripts to tools.
Add list of maintainers to MAINTAINERS.
Merge pull request #16 from d2rk/cleanup

Cleanup
Fix logs format.
Fix logging level selection.
Merge pull request #17 from d2rk/cleanup_logging

Cleanup logging
Add timers.
Merge pull request #18 from d2rk/add_timing

Add timing
Move submodel build to mp model builder.
Sync mp model and mp model parameters.
Now decomposition tree constaints model parameters. Fix a bug, the models cannot share variables.
Now decomposition tree constaints model parameters.
Fix potential bug.
Merge pull request #19 from d2rk/refactor_decomposition

Refactor decomposition
Add logging.
Update naming. Fix clique connectivity algorithm. demo1.mps still fails.
Update naming. Fix clique connectivity algorithm. demo1.mps still fails.
Merge pull request #20 from d2rk/refactor_max_clique_decomposer

Refactor max clique decomposer
Move lazy decomposition tree traversal to utils.
Refactor pipeline. Use current pipeline implementation as a driver and move executor and driver communication mechanism to pipeline. Executor is now running as a thread.