LESS for loop with index support

Based on Max Mikhailov "for" LESS loop this version simply exposes the array index as the second argument in the for loop. This comes in handly in quite a few situations where you have a relation between array indexes etc.

Please note that the index is not optional and it is a required part of the ".-each()" section now.

Example

.for(@yourArray);
.-each(@arrayItem, @arrayIndex) {
}