FFS, PHP

Because it's $CURRENT_YEAR and I'm still hitting the same PHP issues as years ago...

Features

PDO:

Example use:

use \FFSPHP\PDO;
$db = new PDO($dsn, $driver_options);
var_dump($db->execute("SELECT * FROM mytable LIMIT :limit", ["limit"=>3])->fetchAll());

Changed PDO constructor so that the MySQL backend accepts username and password as part of the DSN, just like every other backend.
Added PDO::execute($query, $parameters), so that one can write a templated query without needing to create a single-use prepared statement
Made PDOStatement::execute($parameters) use typed bindings, so that "LIMIT :foo", ["foo"=>3] is rendered as LIMIT 3 instead of LIMIT '3'

Paths:

use \FFSPHP\Paths;

Paths::abspath("./foo");  # /my/dir/foo
Paths::relative_path("out/output.txt", "my/dir/input.txt");  # ../../out/output.txt

VLQ:

use \FFSPHP\VLQ;

VLQ::decode_vlq_array("IAAM");  # [4,0,0,6]
VLQ::encode_vlq_array([4,0,0,6]);  # "IAAM"