Remove PostFile() from session; refine cmake files; replace final with override.

autotest/CMakeLists.txt

@@ -7,7 +7,7 @@ set(AT_SRCS
 set(AT_TARGET_NAME webcc_autotest)
 
 # Common libraries to link.
-set(AT_LIBS webcc ${Boost_LIBRARIES} "${CMAKE_THREAD_LIBS_INIT}")
+set(AT_LIBS webcc jsoncpp gtest ${Boost_LIBRARIES} "${CMAKE_THREAD_LIBS_INIT}")
 
 if(WEBCC_ENABLE_SSL)
     set(AT_LIBS ${AT_LIBS} ${OPENSSL_LIBRARIES})
@@ -31,4 +31,4 @@ if(UNIX)
 endif()
 
 add_executable(${AT_TARGET_NAME} ${AT_SRCS})
-target_link_libraries(${AT_TARGET_NAME} webcc jsoncpp gtest ${AT_LIBS})
+target_link_libraries(${AT_TARGET_NAME} ${AT_LIBS})