* import GTX code
import GTX code
add some empty function before integrate
* set gtx path
* refactor code
* fix typo and ui prefab
change gtx to gxt
remove window from start scene and add it in prefab
* add language interface
add language interface;
add some todo comments;
change file tab; make it consistent with project.
* fix game path and typo
add test ui
* add ui part
* fix set gui style pos
it will cause bug in ctor
* add pages to gxt ui
* revert changes to startup scene
