Merge branch 'fzc-dev' into 'master'

fix: update readme

See merge request !2

README.md

@@ -72,4 +72,5 @@ sh run_tests.sh
 ## 注意
 针对 eigen 需要做下面几处修改：
 + lietorch/eigen/Eigen/src/Core/arch/Default/Half.h:669 行将 ``return half(::hlog(a)); 修改为 return half(::hlog(float(a)));``
-+ lietorch/eigen/Eigen/src/Core/arch/Default/Half.h:776 行将 ``return x + (y-x) * half(float(std::rand()) / float(RAND_MAX));`` 修改为 ``return half(x + (y-x) * half(float(std::rand()) / float(RAND_MAX)));``
++ lietorch/eigen/Eigen/src/Core/arch/Default/Half.h:776 行将 ``return x + (y-x) * half(float(std::rand()) / float(RAND_MAX));`` 修改为 ``return half(x + (y-x) * half(float(std::rand()) / float(RAND_MAX)));``
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++ lietorch/eigen/Eigen/src/Core/MathFunctions.h:578 行将 ``EIGEN_USING_STD(arg);`` 修改为 ``using std::arg;``
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