epm: update copyright date

bin/epm

@@ -60,7 +60,7 @@ print_version()
 {
         echo "EPM package manager version @VERSION@"
         echo "Running on $($DISTRVENDOR) ('$PMTYPE' package manager uses '$PKGFORMAT' package format)"
-        echo "Copyright (c) Etersoft 2012-2015"
+        echo "Copyright (c) Etersoft 2012-2016"
         echo "This program may be freely redistributed under the terms of the GNU AGPLv3."
 }