Change the marker into a form more suitable for modRana

* bigger marker size
* red border if highlighted
* simple mode
Add the initial version of an element for handling marker overlays
Add the highlight field to the search results data model

The data model will be used for displaying the results on the
map and the highlight filed will tell the marker to highlight
the given marker if it is true.
Use the getPage function from rWin

The function caches the pages it provides so
that the search pages should be parsed only once,
but also hold a reference to the page object.
This means they will not be garbage collected
after they are popped from the page stack together
with their result models, so the result model can be
used to show the results on the map without vanishing.
Use the new Markers element for marker display

So far the markers are only used to display search results
on the map, but in the future they should be used for displaying
stored POIs and for other uses. They should also be clickable/interactive
in the future.
Show the search results on the map once a result is clicked

Once a result is clicked firs highlight the result item in the
data model and then assign the data model to the marker display
element in the main map pinch map. Like this all results will
be displayed and the results that was clicked will be highlighted
by a red border ("normal" result points have a blue border.