Custom Spell Contest - Portal Gun

- Added health bar, duration bar to exit portal

- Unit can now auto target exit portal

- Removed minimap radius for portals

- Entrance portal will be destroyed if put on top of exit portal, prevent infinite teleport loop.

- Exit portal is revealed to every player so unit can be teleported directly ( teleport effect cannot teleport without vision - similar to Stalker Blink can only blink near cliff edge, there is currently no field to change that in the effect ) Please tell me if anyone know to make stalker blink without vision.