Increased the energy usage of the Emergency Shield Booster.

The text describing this outfit claims that energy use is
"disproportionately high", which is complete nonsense. The cost
before was *incredibly* cheap. It has been more than quintupled,
to 160. This amount of energy usage does not render the outfit
useless for small ships, though it does make the energy usage
actually a problem for these ships.
Added a diff for making planets black and legal markets.

The diffs are "blackmarket" and "legalmarket". Seems to work
properly.
Removed setBlackmarket function from the Lua API.

The proper way to adjust whether a planet is a black market is now
with unidiffs. I can't justify a Lua function that makes a planet a
black market or legal market only for the current session.
* Missing break.
* Additional warnings.
Merge branch 'expensive_esb' of https://github.com/onpon4/naev into tmp