Make it slower
Review "slow" cases
Update etl
Start working on parallel
Update ETL
Updated tests for debugging/benchmarking
Fix minibatch
Prepare for parallel
Disable some checks temporarily
Review PCD structures
Fix warning
Store gradients for each batch
Isolate iteration
New maybe_parallel_foreach_i functions
Use the maybe_parallel functions
Clean
Link with pthread
Continue support for parallel minibatch
Finalize parallelization of RBM
Default to float weights for rbm/dyn_rbm