(1) support name on <g>.
(2) some refactor.

(1) fix contain point calculation.
(2) remove Geo['_nameCoordMap'], instead, calculate center on demand.
(3) fix that some API missing nameProperty and geoJSON should cached not only by mapName but also by nameProperty.
(4) do not support nameMap in geoSVG until some real requirements come.
(5) svg line polyline use 'region.lineStyle' rather than 'region.itemStyle'
(6) svg text tspan image are enabled to trigger tooltip and user event (but not supported to change state and style yet).

(1) "geoselectchanged" event: add param: allSelected: { geoIndex: number, name: string[] }[]
(2) geoSVG resource support:
+ label
+ emphasis/select/blur state
+ "geoselectchanged" event (on geo component)
+ "selectchanged" event (on map series)
(3) some refactor to make those happen:
+ The original `Region` is migrated to `GeoJSONRegion`. And make `Region` as the base class of `GeoJSONRegion` and `GeoSVGRegion`.
+ Modify the constructor of `Geo`.