Better explosive timers

Because seriously:

* C4's timer can now be set to any (positive) integer, not just 0-9.
* Mininukes now use the same timer input system instead of giving you ten turns to escape.

So you can now give yourself enough time to actually get away from them.

When the Journalist tier rewards get implemented, I'm definitely going to lampshade *this* one.

"The device I found is known as a 'mininuke' - all the destructive power of an atom bomb confined to a space the size of a house. Fortunately, this model has a programmable timer. I had heard of prototype models that gave the user barely a minute to escape, ensuring they would be caught in the blast unless they used hard drugs to push their body to move faster. *Who would invent such a thing?*"