[ADD] Uninstallation, if another Version of oddo is already installed

ubuntu-14-04/odoo_install_nightly.sh

@@ -38,6 +38,9 @@ fi
 # check for 64 Bit or 32 Bit OS
 OS_MACHINE_TYPE=$(uname -m)
 
+# Do I change the version or do I install a completely new odoo?
+OE_VERSION_CHANGE=0
+
 #--------------------------------------------------
 # Update Server
 #--------------------------------------------------
@@ -73,13 +76,15 @@ echo -e "\n---- Add package source ----"
 if [[ $OE_VERSION -eq "8.0" ]]
 	if [[ $(grep -c 'deb http://nightly.odoo.com/9.0/nightly/deb/ ./' /etc/apt/sources.list) -eq 1 ]]
 		sed -n -i 's!deb http://nightly.odoo.com/9.0/nightly/deb/ ./!deb http://nightly.odoo.com/8.0/nightly/deb/ ./!' /etc/apt/sources.list
+		OE_VERSION_CHANGE=1
 	elif [[ $(grep -c 'deb http://nightly.odoo.com/8.0/nightly/deb/ ./' /etc/apt/sources.list) -eq 0 ]]
 		wget -O - https://nightly.odoo.com/odoo.key | apt-key add -
 		echo "deb http://nightly.odoo.com/8.0/nightly/deb/ ./" >> /etc/apt/sources.list
 	fi
 elif [[ $OE_VERSION -eq "9.0" ]]
 	if [[ $(grep -c 'deb http://nightly.odoo.com/8.0/nightly/deb/ ./' /etc/apt/sources.list) -eq 1 ]]
 		sed -n -i 's!deb http://nightly.odoo.com/8.0/nightly/deb/ ./!deb http://nightly.odoo.com/9.0/nightly/deb/ ./!' /etc/apt/sources.list
+		OE_VERSION_CHANGE=1
 	elif [[ $(grep -c 'deb http://nightly.odoo.com/9.0/nightly/deb/ ./' /etc/apt/sources.list) -eq 0 ]]
 		wget -O - https://nightly.odoo.com/odoo.key | apt-key add -
 		echo "deb http://nightly.odoo.com/9.0/nightly/deb/ ./" >> /etc/apt/sources.list
@@ -94,6 +99,9 @@ fi
 # Install the actual nightly build of odoo
 #--------------------------------------------------
 echo -e "\n---- Install odoo ----"
+if [[ $OE_VERSION_CHANGE -eq 1 ]]
+	apt-get remove --purge odoo -y
+fi
 apt-get update && apt-get install odoo -y
 
 echo -e "\nDone! The odoo server is installed and should already run."