nnForge v1.1.10

Hi, here is nnForge v1.1.10. The main new feature is zero-padding for convolutional layers, I should have implemented it long before. The full list of changes:

• You can now specify zero-padding for input data for convolutional layers
• Memory usage calculations improved
• Learning rates is per part now (was per parameter) - training consumes less memory, bigger networks might be trained
• Dropout implementation is simplified
• Minor fixes