Improved export memory handling

Added correct support for in-place memory and memory wrapping.

• Added specification of a ProdConso in export registry;
• Added log_meminfo_text() for text logging of MemoryManager;
• Fixed several issues in MemoryManager for the handling of memory wrapping;
• Added support for memory wrapping in several export kernels;
• Merged Conv1D export kernel with Conv2D kernel for better maintainability;
• Added test on memory wrapped lenet;
• Added in-place specification to several export kernels.