Merge branch 'hierarchical-main-module-names' into 'master'

Accept hierarchical module names also for main modules (as already in the itask branch)

See merge request clean-compiler-and-rts/compiler!1

frontend/parse.icl

@@ -317,7 +317,7 @@ where
 		# (token, scanState) = nextToken GeneralContext scanState
 		| is_icl_mod
 			| token == ModuleToken
-				# (token, scanState) = nextToken GeneralContext scanState
+				# (token, scanState) = nextToken ModuleNameContext scanState
 				= try_module_name token MK_Main scanState
 			| token == ImpModuleToken 
 				= try_module_token MK_Module scanState