Make MyGridTerminalSystem_ModAPI more intuitive

[Aeronaut]

Added a few Methods to make the GridTerminalSystem more intuitive.

[mze9412]

The reason is the following:
You can run a script once per tick. Each tick you call GetBlocks() and get a new list. Instead you could create the list in your script, store it in a member and use it with GetBlocks(myList) each time the block runs. This is not a big thing but can save some memory or garbage collector overhead. Especially if there are many scripts running (i.e. on a DS)

[Aeronaut]

Oky, understood.

[malware-dev]

I'm sorry, but this is highly unlikely to be merged due to the list instantiations.

[Spartan322]

I'll gotta add that I doubt the power of redundancies is gonna get this through.