add some help to function GetTimeSerieGraphByIAFromTO in class SMOSPoint
add function GetNearestPointID(lat, lon) in SMOSDataProvider
some cosmetics in plotting graphs (date label, legend)
fix H polarization = 0, V polarization = 1
add
[P_IA, P_BT] = GetIABT(POINT_ID, DATE_NUM, POLARIZATION)
UpdateDB()

under construct
[H_AI, H_BT, V_AI, V_BT] = GetVVHHPolarization(DATE, LAT, LON)

little improvements
SMOSPointId = GetNearestPointID(lat, lon)
add UpdateDBGeometryTable()
improve 'help-file' SMOSMain.m