Choose inline- or block-mode by parameter

Hi .. first of all .. thanks for your good work!!

I have a feature request, that should be quite easy to implement.

In most cases the automatic behaviour makes sense.  Whether inline or display math is used depends, if the macro tag is used inline or as a block. However in some cases, it would be desireable to determine that by means of a parameter. For example, if there is some text before the macro like so:

with angle: {{formla mode="display"}}\vec a \circ \vec b = |\vec a| \cdot |\vec b| \cdot \cos \alpha{{/formula}}
with coordinates: {{formula mode="display"}}\vec a \circ \vec b = a_1\cdot b_1 + a_2\cdot b_2 + a_3\cdot b_3{{/formula}}