SQL Abstraction Library

* Last tests against master on CircleCI: 

* Install with: npm install someql

* Write backend-agnostic code:

``
// cassandra
const db = require'someql')({ driver: 'cassandra', database: 'tests', username: 'casuser', password: 'caspass', host: '3.4.5.6' });
// mysql
const db = require('someql')({ driver: 'mysql', database: 'tests', username: 'myuser', password: 'mypass', host: '2.3.4.5' });
// postgres
const db = require('someql')({ driver: 'postgres', database: 'tests', username: 'pguser', password: 'pgpass', host: '1.2.3.4', ssl: true });
// defaults to sqlite
const db = require('someql')({ database: './default.sqlite' });

db.read(SELECT * from sometable)
.then((rsp) => {
if (rsp !== undefined && rsp[0] !== undefined) {
for (let i = 0, i < rsp.length; i++) {
doSomethingWith(rsp[0]);
}
return db.write(INSERT INTO othertable (name, otherfield) VALUES ('toto', false));
}
})
.then(() => whatver())
.catch((e) => {
console.error('failed querying DB');
console.error(e);
});
``