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

gitportable/mingw64/lib/tcl8.6/tzdata/Asia/Colombo

@@ -0,0 +1,13 @@
+# created by tools/tclZIC.tcl - do not edit
+
+set TZData(:Asia/Colombo) {
+    {-9223372036854775808 19164 0 LMT}
+    {-2840159964 19172 0 MMT}
+    {-2019705572 19800 0 +0530}
+    {-883287000 21600 1 +06}
+    {-862639200 23400 1 +0630}
+    {-764051400 19800 0 +0530}
+    {832962600 23400 0 +0630}
+    {846266400 21600 0 +06}
+    {1145039400 19800 0 +0530}
+}