Add utilities section for batch processing

[tpmccallum]

There are some cases where we need to sweep through the index and make a change. There are also time when we may want to deliberately populate an index with data (outside of the program's usual functionality i.e. during setup).
A utilities folder has been created at the following URL
https://github.com/second-state/smart-contract-search-engine/tree/master/python/utilities
At present this folder has a script to programatically upload ABI and bytecode as well as to add a new field to every record in an entire index (add the quality field to the common index)

[tpmccallum]

The utilities read from the official configuration so this is reliable and safe.