Added changelog entry for the recent IMS range change
--------------------------Changelog for v1.9.3.1 of SecurityCraft--------------------------
+- Change: The default range of the IMS has been increased from 12 to 15 blocks
- Fix: Newly placed Sentries do not work. To fix non-working sentries, right-click them with redstone
- Misc.: The French translation has been updated to address the new content from v1.9.3
