made the pack completely portable and wrote relevent bat files to go with it

gitportable/mingw64/lib/tcl8.6/tzdata/Antarctica/Casey

@@ -0,0 +1,17 @@
+# created by tools/tclZIC.tcl - do not edit
+
+set TZData(:Antarctica/Casey) {
+    {-9223372036854775808 0 0 -00}
+    {-31536000 28800 0 +08}
+    {1255802400 39600 0 +11}
+    {1267714800 28800 0 +08}
+    {1319738400 39600 0 +11}
+    {1329843600 28800 0 +08}
+    {1477065600 39600 0 +11}
+    {1520701200 28800 0 +08}
+    {1538856000 39600 0 +11}
+    {1552752000 28800 0 +08}
+    {1570129200 39600 0 +11}
+    {1583596800 28800 0 +08}
+    {1601740860 39600 0 +11}
+}