change to tabs for indenting, plus spaces for multiline alignment

[rinusser]

Currently the indenting rules check for either spaces or tabs exclusively (ruleset set to spaces).

Find a way to mix them: tabs should be used for scope indenting, then spaces to e.g. align statements spanning multiple lines, like so (Tab, Space):

function asdf() {
T$x=[1,
TSSSS2];
T...