Add uninstaller into /usr

Suggestion from #46

README.md

@@ -12,7 +12,8 @@ Log2Ram is based on transient log for Systemd here : [A transient /var/log](http
     curl -Lo log2ram.tar.gz https://github.com/azlux/log2ram/archive/master.tar.gz
     tar xf log2ram.tar.gz
     cd log2ram-master
-    chmod +x install.sh && sudo ./install.sh
+    chmod +x log2ram-master/install.sh && sudo log2ram-master/install.sh
+    rm -r log2ram-master
 
 **REBOOT** before installing anything else (for example apache2)
 
@@ -51,7 +52,5 @@ The log for log2ram will be written at: `/var/log/log2ram.log`
 ## Uninstall :(
 (Because sometime we need it)
 ```
-cd log2ram
-chmod +x uninstall.sh
-sudo ./uninstall.sh
+chmod +x /usr/local/bin/uninstall-log2ram.sh && sudo /usr/local/bin/uninstall-log2ram.sh
 ```

install.sh

@@ -16,6 +16,7 @@ then
   chmod +x /etc/cron.hourly/log2ram
   cp log2ram.logrotate /etc/logrotate.d/log2ram
   chmod 644 /etc/logrotate.d/log2ram
+  cp uninstall.sh /usr/local/bin/uninstall-log2ram.sh
 
   # Remove a previous log2ram version
   if [ -d /var/log.hdd ]; then

uninstall.sh

@@ -13,7 +13,8 @@ then
   if [ -d /var/hdd.log ]; then
     rm -r /var/hdd.log
   fi
-
+  echo "Log2Ram is uninstalled, removing the uninstaller in progress"
+  rm /usr/local/bin/uninstall-log2ram.sh
   echo "##### Reboot isn't needed #####"
 else
   echo "You need to be ROOT (sudo can be used)"