ScenReader changes to account for solar display

I've been improving the way of getting the solar display from the
scenario configuration reader.
Deleted MapDemoScenario.java

Now that Game.java does the scenario import, I don't have to use this
file to show off the feature. Jeffery likes the repo clean.
ScenarioConfigurationReader->Scenario, singleton

Since the class stores data rather than simply reading it, I've renamed
it to Scenario. Reading is simply a part of it. It is a singleton now as
well because there is only one Scenario per game; it makes access easier
for other objects.
SolarDisplay reads initial values from Scenario
Game.java now reflects singleton Scenario
Merge branch 'master' of https://github.com/cjeffery/sworsorc

Conflicts:
	src/client/sshexmap/MapDemoScenario.java