rename feature from "autocorrect" to "autoreplace", change names accordingly

indra/llui/lllineeditor.cpp

indra/llui/lllineeditor.h

indra/newview/CMakeLists.txt

indra/newview/app_settings/settings.xml

indra/newview/app_settings/settings_autoreplace.xml

indra/newview/llautoreplace.cpp

indra/newview/llautoreplace.h

indra/newview/llautoreplacefloater.cpp

indra/newview/llautoreplacefloater.h

indra/newview/llfloaterpreference.cpp

indra/newview/llimfloater.cpp

indra/newview/llnearbychatbar.cpp

indra/newview/llviewerfloaterreg.cpp

indra/newview/llviewermenu.cpp

indra/newview/skins/default/xui/en/floater_autoreplace.xml

indra/newview/skins/default/xui/en/menu_viewer.xml

...a/newview/skins/default/xui/en/panel_preferences_chat.xml