'showLevel' option disregarded (Console transport tested)

[VipSaran]

Test case:

var logger = require('winston');
logger.remove(logger.transports.Console);
logger.add(logger.transports.Console, {'showLevel': false});

logger.info('some info');
logger.error('some error');

Output:

$ node test-winston.js
info: some info
error: some error

Expected result would be:

$ node test-winston.js
some info
some error

Winston version: 0.9.0,
Node.js version: 0.10.18.

[indexzero]

We should have better test coverage here obviously. Could you perhaps add one? 😄

[VipSaran]

Test coverage was adequate, but the problem was that test was passing but the code didn't work.
I've created a pull request for this.