Adds automatic java lib mappings for Plugins #731

Not 100% convinced by the implementation here; it would mean the developer has to use `arrayAppend()` when adding their own javaSettings.LoadPaths, as the danger is they override what we've set unintentionally.

wheels/functions.cfm

@@ -14,6 +14,21 @@ this.mappings["/wheels"] = GetDirectoryFromPath(GetBaseTemplatePath()) & "wheels
 // We turn on "sessionManagement" by default since the Flash uses it.
 this.sessionManagement = true;
 
+this.javaSettings={
+	"LoadPaths"=[]
+}
+
+// If a plugin has a jar or class file, automatically add the mapping to this.javasettings
+// This is perhaps a little high up in the load order? Need to double check effects of user overrides to `this`.
+this.pluginFolders=DirectoryList(
+	path=GetDirectoryFromPath(GetBaseTemplatePath()) & "plugins", recurse="true", filter="*.class|*.jar|*.java");
+	
+for (folder in this.pluginFolders) {
+	if(!ArrayFind(this.javaSettings.LoadPaths, GetDirectoryFromPath(folder))){
+		ArrayAppend(this.javaSettings.LoadPaths, GetDirectoryFromPath(folder));
+	}
+}
+
 // Include developer's app config so they can set their own variables in this scope (or override "sessionManagement").
 // Include Wheels controller and global functions.
 // Include Wheels event functions (which in turn includes the developer's event files).