Make block mask optional in sa nas.

See merge request !44

2. Fix unittest of sa nas

Move sensitive from analysis package to prune package.

See merge request !43

add single_distiller

See merge request !31

Fix sa nas

See merge request !38

Add save checkpoint function to sensitive pruner.

See merge request !41

Add sensitive pruner and demo

See merge request !37

add post training quantization api quant_post

See merge request !24

Remove unnecessary arguments in sa nas API

See merge request !36

Add demo for uniform pruner and auto pruner.

See merge request !35

Fix auto pruner.

See merge request !34

Fix pruner in only_grah mode.

See merge request !33