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

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

@@ -0,0 +1,12 @@
+# created by tools/tclZIC.tcl - do not edit
+
+set TZData(:Antarctica/Davis) {
+    {-9223372036854775808 0 0 -00}
+    {-409190400 25200 0 +07}
+    {-163062000 0 0 -00}
+    {-28857600 25200 0 +07}
+    {1255806000 18000 0 +05}
+    {1268251200 25200 0 +07}
+    {1319742000 18000 0 +05}
+    {1329854400 25200 0 +07}
+}