Changes

[Optimize] cl-waffe2/vm cl-waffe2/vm.generic-tensor

!softmax is now working 2x times faster compared to the old one

[Deleted] Interpreter Mode is deleted. Now proceed is working with cl-waffe2 VM.
No runtime (compile nil body)
apply-in-place-mutation! is enabled when forward mode.
Fused: MoveTensor(SAVE_FOR_BACKWARD) into AbstractNode so that more rebundant nodes are pruned
cl-waffe2 VM can handle with functions which returns multiple arguments. to fuse more instructions
[Optimized] The adjoint points of IR: Block in the backward computation nodes. Ref: https://arxiv.org/pdf/1810.07951.pdf https://arxiv.org/pdf/1810.11530.pdf
[Optimized] Making more macros to be executed before the execution. Testing time is reduced from 1min to 5sec.
[Optimized] define-impl-op macro enabled reducing the time due to (compile nil body). More Operations (e.g.: MaxMin, Matmul) could be reimplemented with this macro. This indicates that in the future cl-waffe2 can be used like define-by-run while Composites can be compiled statically.
Disassembled Backward InstructionSeq has become much more smaller!!! In-place mutation in backward also works well!!!

[Deleted] define-static-node define-composite-function. Integrated into define-op and defmodel-as macros respectively.
[Added] define-impl-op defmodel-as (See documentations)
CPUTensor is now a subclass of LispTensor
[Documentation] Updated docstrings on the nodes/generic-tensor package.