app: Access UIRefreshControl class indirectly

NOTE: Accessing directly causes issues on older versions of iOS, where the
      UIRefreshControl class does not exist.
app: Removed "device name" from email
notifier: Fix file permissions now works for both mobile and root
as_root: Added variables for clarity
as_root: Added "chmod" and "chown" commands

NOTE: Also added support for mobile's log directory, and moved path
      definitions to a separate common file.
notifier: Fixed vim modeline
notifier: Removed superfluous symbolicate call
Minor fix of header information
Renamed common files to lowercase
app: Updated files to use paths.h
Moved as_root utility code to Common and added support for chmod/chown
Renamed as_root utility file to avoid confusion
Compile notifier source as ObjC, not ObjC++
app/notifier: Moved common functionality to shared source file
notifier: Removed redundant code
app: Support suspect retrieval for pre-symbolicated files
app: Removed line leftover during creation of crashlog_util