Add support for other chars in _id

[cubap]

<rule>
    <note>
        Redirect find annotation by provided object id.
    </note>
    <from>^/id/([a-z0-9]+)$</from>
    <to type="forward">/id/getByID.action?oid=$1</to>
</rule>

[cubap]

This will allow for flexible Slugs #96

[cubap]

[0-9a-zA-Z_~-\+] should do it or [\w~-\+] if that's supported.

[cubap]

I support not supporting anything that has to be URLEncoded (%25 kind of stuff) or stuff that has a reserved use. This means no ?!%$,.@#&^*()\|/"'``:;<>[]{}=