avoided using resources or asset bundles

many sprites weren't showing up in the web player because they were
in a Resources folder. I fixed that by manually creating arrays of
the sprites instead of reading them from a file.

There's tons of junk being committed. I gotta look into a better
.gitignore...
A few tiny "typo fixes"

1. changed gui text from "troops" and "randos" to "soldiers" and "civilians"
   to match the rest of the project
2. repositioned background & units to match web player's aspect ratio
3. disabled EndTurn button when the NewHero button is disabled (it wasn't
   supposed to linger there, and could cause a bug)
4. un-deactivated the "disabled" speech bubble variant (oops)