updated iscroll lib to v5

* updated iscroll to verion 5
* fixes #52, unwanted click event after drag release
* patched iscroll.js to fix a bug blocking click events

https://github.com/cubiq/iscroll/pull/831

* updated yuicompressor to latest version
changes url for aprs tiles to the new subdomain
add DarkMatter base tiles; improved host selection

* removed OSM B&W, which seems to no longer exist