correctly handle disk/memory cache for icons
a little refactoring
method to create reuse object
use the new methods.
Dont rotate if %360
method to rotate a point
temp method to compute memory heap size
fix wrong change to disk cache size
refactoring test about memory size
refactoring so that goTo is computed using the difference in screen coords and not map coords. First step to get map orientation to work correctly during animation
added comment
correctly compute marker rect with map orientation. makes gestures and drawing work correctly with orientation