Relax brks around annotations

[lofcz]

This adds a new mode for parsing annotations values. In this mode curly brackets around table value are not required and an annotation value is always parsed as a table.

In this mode the following:

@Annotation("key1", "key2")
function f() {

}

Is parsed the same way as:

@Annotation({"key1", "key2"})
function f() {

}

In the default mode.