Sync adaptive logs from pushback server

Added a class that pulls down the adaptive log files from the pushback server. Initially this was via rsync, but then I found out Ken had written a /log/device_id route, which was much simpler. So now it uses that instead. After files are fetched, it looks for an adaptive log file (something matching og_adaptive_os*.txt) from which to grok the appropriate device_id. Then it saves the adaptive log data into a new file: adaptive_ios_<tags>_<wifi>_<whatever>.txt

N.B. This also includes some (unobtrusive) stuff about geojson identifiers, which is not used yet.