Created ERPNext Upgrade to Version 5 (markdown)

ERPNext-Upgrade-to-Version-5.md

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+
+#### Step 0: Configure Barracuda
+
+*This step is only required if you ran the install script before 25th March, 2015*
+
+Create 
+
+* `/etc/mysql/conf.d/barracuda.cnf` in case of Debian/Ubuntu or 
+* `/etc/my.cnf.d/barracuda.cnf` in case of CentOS / RedHat
+
+with the contents,
+```
+[mysqld]
+innodb-file-format=barracuda
+innodb-file-per-table=1
+innodb-large-prefix=1
+character-set-client-handshake = FALSE
+character-set-server = utf8mb4
+collation-server = utf8mb4_unicode_ci
+
+[mysql]
+default-character-set = utf8mb4
+```
+
+#### Step 1: Update bench-repo
+
+As the frappe user, 
+```
+cd ~/bench-repo
+git pull
+```
+
+#### Step 2: Switch branch
+```
+cd ~/frappe-bench
+bench switch-to-develop --upgrade
+```
+This will take time.
+
+#### Step 3: Restart services
+
+If you've setup for production, run
+```
+service nginx restart
+supervisorctl reload
+```
+
+as root.
+
+Also, with version 5, the command line has changed, run
+```
+cd ~/frappe-bench
+bench --help
+```
+to see the list of available commands