1. Auto transformation between data format, data type and memory type.
2. Add device placement optimization strategy.

add extract pooling, kaldi batchnorm and IfDefined

See merge request !1057

add extract pooling and kaldi batchnorm

add time index info in extract pooling

add benchmar& test for kaldi components

add batch support for kaldi

change ifdefined to delay

Refactor thread code

See merge request !1070

Update quantize libs to support thread pool

See merge request !1067

convert tf Min and Max to reduce_min and reduce_max

See merge request !1066

update converter for tf.split and onnx.pad

See merge request !1065

Replace thread pool: MERGE ME FIRST

See merge request !1062

add support splite with num_splits=1

Update docs with iOS support

See merge request !1063

Benchmark thread pool and openmp

See merge request !1051

Fix post train quantize

See merge request !1059

Support multiple inputs and outputs for Hexagon DSP

See merge request !1058

Refactor depthwise conv

See merge request !1052

Fix MT6771 OpenCL 2.0 breakage

See merge request !1056

Fix report bug for CI.

See merge request !1055

Fix quantize

See merge request !1053

add dynamic lstm cell

See merge request !1003

Support int32 input data type.

See merge request !1047

support kaldi tdnn-lstm

support logsoftmax

add ifdefined op

add dynamic lstm docs

fix mace run tools for darwin

See merge request !1036

N/A
Signed-off-by: NLuxuhui <luxuhui@xiaomi.com>

Fix nullptr in mace_run when build with code mode

See merge request !1048

update docs for cause of stacktrace symbols lacks

See merge request !1049

1. Support int32 input data type.
2. Support GatherV2 op
3. Add transpose to ExpandDim op.