allow extensions to be named without a period

[calvinmetcalf]

like the extension naming in express.

[ericf]

Is there a problem you ran into? IIRC Express supports with/without the leading dot.

[calvinmetcalf]

yes express supports both but but this library only supports with a dot meaning code like this

app.engine('hbs', handlebars({
    defaultLayout: 'main',
    extname: 'hbs'
}));

fails and needs to be written like this

app.engine('hbs', handlebars({
    defaultLayout: 'main',
    extname: '.hbs'
}));

source: I ran into this problem yesterday (assuming I could use the upper code) when trying to use your otherwise fine module, then my coworker did the exact same thing like 20 minutes later.