Own markers, Groups und Tooltip Description

Hi,

Three suggestions / feature requests for Linky Map

1) Load own markers - At the moment there's only a Circle-Option to set a marker. It would be nice to have an option, to set own Marker as PNG or GIF

2) It would be nice, if countries and regions could be grouped manually. At the moment it depends on the type of the Map (e.g. continents, subcontinents, ). For example in Europe -> Belgium + Netherlands + Luxemburg are often grouped as "Benelux" Region. Or Germany + Austria + Switzerland is often Grouped as "D-A-CH" Region.

3) It would be nice, if the ToolTip Description would be an option, not a required field. Sometimes we don't need an aditional description but we have to enter one bevor saving a map.

best regards
Björn