Revert "derive from GCBase"

This reverts commit 59dc33bc71c0eaf09c01e576786aa5ffe49f98d1.
print CMAKE_BUILD_TYPE/CMAKE_C_FLAGS/CMAKE_CXX_FLAGS
Merge branch 'master' of https://github.com/plenluno/libnode
update submodule 'libuv'
update submodule 'libj'
print the number of remaining objects
use LIBJ_STATIC_CONST_STRING_DEF
create symbols
update submodule 'libj'
use LIBJ_STATIC_CONST_STRING_DEF
fix a build error
use LIBJ_SYMBOL_DEF
introduce debug mode
update submodule 'libj'
update submodule 'libj'
introduce LIBNODE_DEBUG_PRINT
add debug messages
modify indentation
add freeGlobalAgent for debug mode
add OnRead::unsetServer