very important fix: When reusing a bitmap. Must clear it first, otherwise we might end up drawing the wrong tile
those actions should not be seen as "user" actions: won't stop userlocationoverlay trackingmode
i think it actually makes rescale faster. Let's try it
don't snap when following the user, unecessary!
no need to check if there is already a tile in memory, always put expired (which are actually just scaled tiles) in memory
refactoring of the scale loopers.
Merge branch 'mb-pages' of github.com:mapbox/mapbox-android-sdk into mb-pages