Better exception handling - print stack trace to LogCat
Add Portals Discovered stat that is present when you have discovered portals

* When portal submissions have been accepted (any), a "Portals Discovered"
  stat will appear in the "Discovery" section of the stats page.  Add this.
Switch to recognizing stats based on their labels

* Previously stats  were recognized by their line number block
  position.  This posed a problem when I found that some profiles
  have a "Portals Discovered" field and others don't.
* Switched to recognizing the stats based on their field name -
  so I'm now depending on the recognizer to recognize field names
  correctly.
Hack fix for misrecognized field name "XM Reoharged"

* XM Recharged field was being recognized as "XM Reoharged" for some
  stat images.  Fixed by adding "XM Reoharged" to be recognized
  specifically for XM Recharged.