2.0 A pretty-format functionality

[green-coder]

While using HoneySQL, I found myself often having to insert new lines in the SQL statements generated by the format function in order to read them and see if the SQL is what I wanted to obtain.

It would be nice for the user to have a programmatic way to make the generated SQL string readable on multiple lines.

I imagine multiple approaches:

1. Having the format function take a :pretty true option.
2. Having a separate pretty-format function just for development purpose.
3. Having a pretty-sql function that changes a string of SQL into a prettier string of SQL.

The option 2 avoids any performance impact on the format function.
The option 3 additionally avoids any coupling between SQL generation and "pretty formatting".

[seancorfield]

In 2.0, format will accept a :pretty? true option that will add newlines into the generated SQL.