Unittests and demos update

-fixed bug in EntityManager
-added better support for non-betterC unittests
-added many new unittests
-slightly improved JUnit xml output
-fixed WASM compile script
-added new textures
-fixed model texture coordinaes in demos
-some minor bug fixes in demo
TODO: demos cpu usage in non-betterC mode

source/ecs/manager.d

@@ -1752,6 +1752,7 @@ export struct EntityManager
                     }
                     add_len++;
                     //move elements after new listener
+                    if(add_len < tmp_add.length)
                     for (int k = add_len; k > j; k--)
                     {
                         tmp_add[k] = tmp_add[k - 1];
@@ -1771,6 +1772,7 @@ export struct EntityManager
                     }
                     rem_len++;
                     //move elements after new listener
+                    if(rem_len < tmp_add.length)
                     for (int k = rem_len; k > j; k--)
                     {
                         tmp_rem[k] = tmp_rem[k - 1];
@@ -1790,6 +1792,7 @@ export struct EntityManager
                     }
                     ch_len++;
                     //move elements after new listener
+                    if(ch_len < tmp_add.length)
                     for (int k = ch_len; k > j; k--)
                     {
                         tmp_ch[k] = tmp_ch[k - 1];