Support for Mist of Pandaria

[navara]

Right now even options menu do not open with:

`1x EnhancedFlightMap/MapWindow.lua:200: attempt to index global 'EFM_MapWindowNew' (a nil value)
[EnhancedFlightMap/MapWindow.lua]:200: in function 'EFM_MW_OpenMap'
[EnhancedFlightMap/EnhancedFlightMap.lua]:133: in function 'EFM_SlashCommandHandler'
[EnhancedFlightMap/EnhancedFlightMap.lua]:24: in function '?'
[Blizzard_ChatFrameBase/Classic/ChatFrame.lua]:5074: in function <Blizzard_ChatFrameBase/Classic/ChatFrame.lua:5020>
[C]: in function 'ChatEdit_ParseText'
[Blizzard_ChatFrameBase/Classic/ChatFrame.lua]:4726: in function <Blizzard_ChatFrameBase/Classic/ChatFrame.lua:4725>
[C]: in function 'ChatEdit_SendText'
[Blizzard_ChatFrameBase/Classic/ChatFrame.lua]:4762: in function <Blizzard_ChatFrameBase/Classic/ChatFrame.lua:4758>
[C]: in function 'ChatEdit_OnEnterPressed'
[*ChatFrame.xml:120_OnEnterPressed]:1: in function <[string "*ChatFrame.xml:120_OnEnterPressed"]:1>

Locals:
mapNum = nil
(*temporary) = nil
(*temporary) = nil
(*temporary) = "attempt to index global 'EFM_MapWindowNew' (a nil value)"
`