Update README examples for tql 0.1 behaviour

[jq-rs]

Current (15/2/2018) README example does not work properly with 0.1. Connection-parameter is missing. SQlite example is also missing. Please add new examples which work out-of-the box on nightly and stable.

[antoyo]

I've updated the README:
I hope it clarifies things.
Also, could you please open an issue with the code causing an error with SQLite?
Thank you.

[jq-rs]

Unfortunately, I think the examples are still incorrect in the master branch as e.g. the connection parameter is missing:

fn main() {
    let connection = get_connection();

    // We first create the table.
    // (You might not want to execute this query every time.)
    let _ = sql!(Model.create());

    // Insert a row in the table.
    let text = String::new();
    let id = sql!(Model.insert(text = text, date_added = Utc::now())).unwrap();

    // Update a row.
    let result = sql!(Model.get(id).update(text = "new-text"));

    // Delete a row.
    let result = sql!(Model.get(id).delete());

    // Query some rows from the table:
    // get the last 10 rows sorted by date_added descending.
    let items = sql!(Model.sort(-date_added)[..10]);

[antoyo]

Where is it missing?
We can see the connection paramater at the end of this section.