Changed some parameters in 'rbm_tools.py' in order to reduce the running time of 'test_ais.py'.
From now on, test_ais.py can either be run in fast/innacurate mode or slow/accurate mode.
Made code PEP8 compliant
Fix regression w.r.t. !pkl tag.

Use yaml.serialize(node) rather than 'mapping' in multi_constructor_pkl
for the yaml_src.
Added regression test for 2ffbb64.
Merge pull request #1012 from dwf/fix_yaml_src_pkl

Fix regression w.r.t. !pkl tag from #907.
Reduced the runtime of the script test_softmaxreg.py
Reduced the runtime of the script test_dropout.
Added the yaml files mnist_fast.yaml and mnist_valid_fast.yaml.
Note: these files should have been included in the previous commit.
Fix for num classes in DenseDesignMatrixPyTables
Merge pull request #1019 from mlisicki/pr

Fix for num classes in DenseDesignMatrixPyTables
From now on, the script runs using the faster settings only if the mode is set to DEBUG_MODE.
Removed outdated documentation
From now on, the script runs using the faster settings when the mode is set to DEBUG_MODE.
From now on, the script runs using the faster settings when the mode is set to DEBUG_MODE.
Merge pull request #1014 from AlassaneNdiaye/reduce_runtime_test_softmaxreg

Reduced the runtime of the script pylearn2/scripts/tutorials/softmax_regression/tests/test_softmaxreg.py
Merge pull request #1006 from AlassaneNdiaye/reduce_run_time_test_ais.py

Modifications to the tests in 'pylearn2/tests/rbm/test_ais.py' in order to reduce their running time.
Reverted some of the settings to their previous values.
Merge pull request #1015 from AlassaneNdiaye/reduce_runtime_test_dropout

Reduced the runtime of the script test_dropout.