Trying to add coveralls support to the project

First attempt
Merge branch 'CoverallsSupport' into develop
Starting to use the job serialization tools

Trying to solve some pickle issues.
Using joblib's serialization also on the misclassified task
Merge pull request #16 from gendoc/UsingJoblibSerialization

Using joblib serialization
Fixing parameter name

sefl -> self
Test had three methods with the same name #shameOnMe
Adding pylint to the default make target
Extracting the cli arguments definition from the bin/mlpal file

It's getting bigger each day.
Removing --tests flag

It turns out it wasn't needed.
Removing --tests from args.py
Splitting BaseLearningSpecTest into two tests.
Adding pwd to sys.path when $MLPAL_TESTS is set

Making sure the right mlpal source is loaded for tests.
Running make test-coverage on travis
Coverage should cover only the mlpal package.
Adding a .coveragerc with an omit section

Shoulg make the coverage reports report only the mlpal coverage data.
Removing /usr/share* and */pyshared/* from coverage
Adding the coveralls badge to the READM
Build status and coverage badges for master and developer
Update README.md