SkyEternal: allocates new z-levels of sky as needed, or on request.
Merge branch 'skyEternal' into infiniteSky

Conflicts:
	plugins/CMakeLists.txt
Infinite sky: get it to compile.
Infinite sky: rename from sky eternal.
Infinite sky: added helpful print statements.
Infinite sky: added glyphs and made it print status when no arguments given.