Add address data to the banks_info.json file

[KWangechi]

There is need to know the exact address of the branch locations for easier identification, e.g can have town name, street name, building name etc

Can also add the tag 'Head Office' to the branches that are headquarters eg

{
"bank_name": "Equity",
"branches: [
{
   "branch_name": "Nairobi - Head Office"
}
]
}