Add haxe variable with version value + error if haxe is less than 3.2.0. Fix #820

include.xml

@@ -1,6 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <extension>
 	
+	<log error="Lime ${lime} is not compatible with Haxe ${haxe} (version 3.2.0 or higher is required)" if="${haxe < 3.2.0}" />
+
 	<set name="lime" />
 	
 	<haxedef name="native" if="cpp || neko || nodejs || cs" />

lime/project/ProjectXMLParser.hx

@@ -128,7 +128,11 @@ class ProjectXMLParser extends HXProject {
 			
 		}
 		
-		defines.set ("haxe3", "1");
+		var p = new sys.io.Process ("haxe", ["-version"]);
+		var haxeVersion = StringTools.replace (p.stderr.readAll ().toString (), "\n", "");
+		p.close ();
+		defines.set ("haxe", haxeVersion);
+		defines.set ("haxe"+haxeVersion.split(".")[0], "1");
 		
 		if (debug) {