Configureable timout for applications to close their windows.

Fix 5sec stall when switching from an application to be stopped to an application that was stopped before.
Make Xinstance thread safe

CMakeLists.txt

@@ -2,8 +2,8 @@ cmake_minimum_required(VERSION 2.4)
 
 project(sigstoped)
 
-set(SRC_FILES main.cpp process.cpp xinstance.cpp)
-set(LIBS -lX11)
+set(SRC_FILES main.cpp process.cpp xinstance.cpp CppTimer.cpp)
+set(LIBS -lX11 -lrt)
 
 add_executable(${PROJECT_NAME} ${SRC_FILES})