Convert map from little to big endian

[meirtsvi]

Current the map being downloaded from waze site is encoded in little endian. Due to this fact the C code does not include the 'download map' functionality in BB and WP7 versions.
In order to support downloading the map, there has to be code that can convert the wzm file (map file) from little to big endian.

Another alternative is to download all possible tiles and concatenate them. For each tile request, the concatenated file will be searched first and in parallel a request to download the latest version of the same tile will be submitted. This way the user will get to see the tile instantly but will also enjoy from up-to-date changes if available.

Once this is done, we can use local search to find a route: search for 'navigate_main_local_calc_enabled' in code and maybe do local search before doing the internet search to increase the chance we always return a route even if it's not optimized.