beta 0.1.1.3

- fix benchmark script for older version adb
- add FAQ.md
- add environment requirement in Install.md
- add coeff in Eltwise Op
- fix bugs in strassen 1x1 data preparation
- add download failure process in get_model.sh

beta 0.1.1.2

- fix register typo
- add input count in conv model
- add 5x5 winograd convolution for OpenCL
- edit condition to use half in OpenCL
- upgrade build.gradle