clean clang format errors and cpplint errors

add some test cases for histogram summary operator

Merge pull request !400 from amongo/FixMathOps

format code

remove test case for fp64

add back scalar manipulation

remove save graph

Merge pull request !317 from huanghui/derelu_fusion_pass

Merge pull request !285 from ZhangQinghua/master

Merge pull request !346 from laiyongqiang/develop

Merge pull request !329 from chenjianping/building-on-windows-2

Merge pull request !282 from chujinjin/fix_pynative_conv_pf

Merge pull request !25 from zhangbuxue/unfold-develop

Merge pull request !325 from fary86/fix-batchnorm-doc-and-slog-path-duplication

Merge pull request !306 from limingqi107/master

twice in log

Merge pull request !274 from ZPaC/gpu-backend-supports-multiple-streams

2.GPU commnication stream and compute stream overlap.

Merge pull request !291 from caifubi/dev-getnext-mem-reuse-off

Merge pull request !132 from huanghui/master

Merge pull request !20 from jinyaohui/master

Merge pull request !129 from wanghua/master

Merge pull request !124 from yankai10/add_support_for_bool

Merge pull request !98 from ghzl/ge-exec-EnableDump-change-to-str

Merge pull request !109 from leonwanghui/typo-fix

Signed-off-by: leonwanghui <leon.wanghui@huawei.com>

Signed-off-by: leonwanghui <leon.wanghui@huawei.com>