Manually compiles a page fragment that has been inserted into the DOM
by external code.
All registered compilers and macros will be called
with matches in the given element.
As long as you manipulate the DOM using Unpoly, you will never
need to call up.hello(). You only need to use up.hello() if the
DOM is manipulated without Unpoly' involvement, e.g. by setting
the innerHTML property:
element = document.createElement('div')
element.innerHTML = '... HTML that needs to be activated ...'
up.hello(element)
This function emits the up:fragment:inserted
event.
