Merge tag '4.7.0'

diff --cc modules/core/include/opencv2/core/version.hpp
index 780691e1a3d9175f9e7d390488d736524c47601d,3227c4e6457c2f390c4d0aa7294e83eb4f09003f..f158eb842c220932b36af1719f63bd181bdb21d4
--- 1/modules/core/include/opencv2/core/version.hpp
--- 2/modules/core/include/opencv2/core/version.hpp
+++ b/modules/core/include/opencv2/core/version.hpp
@@@ -8,7 -8,7 +8,7 @@@
  #define CV_VERSION_MAJOR    4
  #define CV_VERSION_MINOR    7
  #define CV_VERSION_REVISION 0
- #define CV_VERSION_STATUS   "-pre"
 -#define CV_VERSION_STATUS   ""
++#define CV_VERSION_STATUS   "-dev"
  
  #define CVAUX_STR_EXP(__A)  #__A
  #define CVAUX_STR(__A)      CVAUX_STR_EXP(__A)