Fix install on xenial

install

@@ -118,10 +118,14 @@ _run() {
 ###
 # 1- Update the apt sewers with fresh info
 ###
+
 if [ -z "$wo_travis" ]; then
-    if command_exists curl; then
-        apt-get update -qq
-    else
+    if ! {
+        apt-get update --allow-releaseinfo-change -qq > /dev/null 2>&1
+    }; then
+        apt-get update -qq > /dev/null 2>&1
+    fi
+    if ! command_exists curl; then
         apt-get update -qq && apt-get -y install curl -qq > /dev/null 2>&1
     fi
 fi

wo/core/aptget.py

@@ -19,8 +19,7 @@ class WOAptGet():
         try:
             with open('/var/log/wo/wordops.log', 'a') as f:
                 proc = subprocess.Popen(
-                    'DEBIAN_FRONTEND=noninteractive apt-get update '
-                    '--allow-releaseinfo-change',
+                    'DEBIAN_FRONTEND=noninteractive apt-get update -qq',
                     shell=True, stdin=None, stdout=f,
                     stderr=subprocess.PIPE, executable="/bin/bash")
                 proc.wait()