* fix infer crashes caused by conv/pool upgrades, test=release/1.6

* fix bug, test=release/1.6

* update operator compatible info, test=develop

* revert cmake/version.cmake, test=develop

* add unit_tests and fix bugs, test=develop

* update ../paddle/fluid/framework/framework.proto, test=develop

* fix bug of paddle/fluid/inference/api/analysis_predictor.cc, test=develop

* update paddle/fluid/framework/version_test.cc, test=develop

* add comments and rename interfaces, test=develop

* add op compatible infomation; test=develop

* add enum type

* add enum type; test=develop