Revert "Revert d766930..e211f39"

This reverts commit 164991fd6cca0c45ab9dbf0193e01b59a1b37b98, reversing
changes made to 61c2eccdcaa715a4ff716918d57dccf4f1812e49.

Conflicts:
	src/course_project/Server.java
	src/course_project/TestClient.java
	src/query/FileTransfer.java
	src/query/Pack.java
	src/query/QueryID.java
	src/queryClient/PhotoReceiver.java
	src/queryClient/RequestCheckLogin.java
	src/queryClient/RequestUserPage.java
	src/queryServer/CheckLogin.java
	src/queryServer/ClientQueryHandler.java
	src/queryServer/GetBattle.java
	src/queryServer/GetBattleList.java
	src/queryServer/GetPhoto.java
	src/queryServer/GetUserPage.java
	src/queryServer/IStrategyQuery.java
	src/queryServer/SQLProcessor.java