Edit code in Frappe apps

[kid1194]

@sinnguyen Check this.

@kennethsequeira

• Go back to the frappe-bench directory and run the migrate command: bench migrate (in case of multiple sites, run the command with the site flag: bench --site sitename migrate)
• bench migrate is the migration script which makes the appropriate changes in the db
• In case you want to restart all processes, you can do bench restart