added script for timezones generation

scripts/generate-timezones.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+ZONES=`find /usr/share/zoneinfo -type f | sed 's/\/usr\/share\/zoneinfo\///g' | xargs -n1 | sort -u | xargs`
+
+OUTPUT="{"
+for ZONE in $ZONES
+do
+  if [ $ZONE != "+VERSION" ]; then
+    OFFSET=`env TZ=${ZONE} date +%z`
+    NUMBER=`env TZ=${ZONE} date +%z | sed -E 's/(\+|\-)(0{0,3})//g'`
+    if [[ $OFFSET == *"-"* ]]; then
+      OFFSET="-$NUMBER"
+    else
+      OFFSET=$NUMBER
+    fi
+    OUTPUT="$OUTPUT\"$ZONE\": $OFFSET,"
+  fi
+done
+
+OUTPUT="$OUTPUT}"
+OUTPUT=`echo $OUTPUT | sed 's/,}/}/g'`
+echo "$OUTPUT" > timezones.json
+
+