Add debug log handling

Add a method to output debug messages to the ownCloud log.
Add debug logging to all classes.
Makefile: Add option to create debug distribution.
Remove deleteOldWbo() log

Don't writeLog() when no old WBO was found.
Change log format
Enclose Email and Sync address inside <code>
Remove bold from table and add nbsp for table spacing
Add warning if duplicate email is used
Change settings layout
Add sync info to settings page
Merge branch 'add_info_on_user_page' into mozilla_sync_1.2
Merge branch 'debug' into mozilla_sync_1.2

Conflicts:
	lib/storageservice.php
Merge branch 'master' into mozilla_sync_1.2
Add and update documentation to appinfo/remote.php
Added and updated documentation in lib/outputdata.php
Remove unneeded code from lib/outputdata.php
Add and update documentation in lib/storage.php
Add and update documentation in lib/storageservice.php
Add and update documentation for lib/urlparser.php
Add and update documentation for lib/user.php
Add and update documentation for lib/userservice.php
Consistent naming of Mozilla Sync user hash: $syncHash