Using Cuts produce noisy output (model.logLevel=0) -> desired behaviour?

Hi,

i just implemented a prototype interface to Cbc for [cvxpy](https://github.com/cvxgrp/cvxpy/pull/260) using cylp (great project).

When using this to solve some naive tsp-model without using any cuts, loglevel=0 works and there is no output.

Activating `LiftProjectCuts` on the other hand results in the following (shortened) output:

```
Clp3003W Analysis indicates model infeasible or unbounded
Clp6003E Matrix has 144 large values, first at column 20, row 110 is -1.7976931e+308
Clp0004I Stopped due to errors - objective value 0
Clp0032I Errors objective 0 - 0 iterations time 0.002
Clp6003E Matrix has 144 large values, first at column 20, row 110 is -1.7976931e+308
Clp3003W Analysis indicates model infeasible or unbounded
Clp6003E Matrix has 144 large values, first at column 20, row 110 is -1.7976931e+308
Clp0004I Stopped due to errors - objective value 0
Clp0032I Errors objective 0 - 0 iterations time 0.002
```

Additional example with CliqueCuts:

```
rcl Found 0 new violated cliques with the row-clique method
rcl The largest admissible number was 0 (threshold 12)
rcl all row cliques have been enumerated

scl Found 0 new violated cliques with the star-clique method
scl The largest star size was 4 (threshold 12)
scl Enumeration 6 times, found 0 maxl cliques
scl Greedy 0 times, found 0 maxl cliques
scl Skipped a star b/c of small solution value 0 times
scl all cliques have been enumerated
```
- **(1)** Is there any way to switch off this output too?
- **(2)** Side-question: are LiftProjectCuts working correctly when the output looks like that? I'm asking because the result is correct.

Thanks
Sascha