Adds additional dice!

Places where the D6 and D20 spawned (the library and perma) now spawn with a dice bottle. Said dice bottles now contains a D2, D4, D8, D10, and D12 in addition to the preexisting D6 and D20 for a richer meta-roleplaying experience.

This also fixes an obscure bug where dice could be generated invisible because their initial value was set to 0.

Additionally this fixes the grammer of dice descriptions, which were not using the singular "die".
tweaks to the dice:

*the dice now all have different colors, to make them easy to tell the difference between them at a glance.
*the d2 has been swapped out for a d00, though you can still create a d2 if someone demands it.
*the generic pill bottle full of dice has been replaced with a proper dice bag.
*actually throwing a die will now cause it to roll until the throw ends, at which point it will state the result of the throw. The old method still works as well.
*most new dice have had their sprites edited to be smaller.
*minor grammer corrections.
Final Sprite Tweaks
*D12 has been turned a more vibrant shade of orange
*The dicebag sprite has been improved with some help from Cheridan
*Let's roll
Whoops the dicebag sprite got more awesome at the last second, this is all Cheridan's fault :0
Merge pull request #947 from Incoming5643/dice

Adds additional new dice