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Merge remote-tracking branch 'hui/merge_upstream'
add apis to saeclient
add more pminer apis and data
remove patent related entity for performance
fix PatentSearchByGroup bug
add support doc searcher
add network integration
add the missing support_doc_searcher.hpp
Merge remote-tracking branch 'upstream/master' into merge_upstream

Conflicts:
	backend/src/expert_searcher.cpp

	modified:   backend/src/CMakeLists.txt
	modified:   backend/src/aminerdata.cpp
	modified:   backend/src/aminerdata.hpp
	modified:   backend/src/expert_searcher.hpp
	deleted:    backend/src/group_searcher.cpp
	modified:   backend/src/group_searcher.hpp
	modified:   backend/src/main.cpp
	modified:   backend/src/pminer.hpp
	modified:   backend/src/pminerdata.hpp
	modified:   backend/src/pminerimporter.cpp
	modified:   backend/src/search.cpp
	modified:   backend/src/search.hpp
	new file:   backend/src/support_doc_searcher.hpp
	deleted:    backend/src/user_searcher.cpp
	modified:   backend/src/user_searcher.hpp
	modified:   backend/src/weibo.hpp
	modified:   backend/src/weibodata.cpp
	modified:   backend/src/weibodata.hpp