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
change heading style and added some headings
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