STORM-1738 - Add autocorrect functionality

indra/llui/lllineeditor.cpp

indra/llui/lllineeditor.h

indra/newview/CMakeLists.txt

indra/newview/app_settings/settings.xml

indra/newview/app_settings/settings_autocorrect.xml

indra/newview/llautocorrect.cpp

indra/newview/llautocorrect.h

indra/newview/llautocorrectfloater.cpp

indra/newview/llautocorrectfloater.h

indra/newview/llfloaterpreference.cpp

indra/newview/llviewerfloaterreg.cpp

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

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

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