Uses InstanceScope.INSTANCE to set the preference
Moves all login logic from the activator-class to the openToxLoginOutListener-class.

It also:
* Makes OpenToxs authorization service an account property.
* Adds a new login method to openToxs manager: login(String user, String pass, String authService)
* Adds a new method for geting the authorization service from the opentox manager
* Adds a new metod the reset the authorization service
* Adds javaDoc to the openToxLoginOutListener-class
* Adds a logger to the openToxLoginOutListener-class
* Makes the openToxLoginOutListener-class a singleton
Makes the auth. service property requierd
Merge pull request #5 from KlasJoenssson/Bug3475

Moves all login logic from the activator to the openToxLoginOutListener
OpenTox ds models pick up changes to OpentoxService without restart

Using InstanceScope to get the preferences.
It now picks up changes without restart.
Fixed a small spelling error
Made the inner class public, because it caused a ClassNotFoundException as soon as I add another prefs page, which does not even use that class... yes, really weird; really Eclipse
Adds preferences and matching page for some network properties.

- the HTTP time out (with a new default of 50 secs)
- the shortest time when polling a Task (still at 2 secs)
- the longest time when polling a Task (still at 20 secs)
Added missing trailing slashes on the fly
Stop trying multiple times; just once
When no data set was created, do not continue and return empty results
Merge pull request #12 from egonw/6-onlyContinueWithDataSet

When no data set was created, do not continue and return empty results
Merge pull request #11 from egonw/5-onlyOneTry

Stop trying multiple times; just once.
Merge pull request #10 from egonw/4-trailingSlash

Added missing trailing slashes on the fly
Merge pull request #7 from egonw/1-typoFix

Fixed a small spelling error
Merge pull request #8 from egonw/2-networkPrefs

Allow setting of custom network properties. Addressing bug #3487.
Adds a class for making a test-login
Hook on to the new testLogin extension
Adds a logger and documentation to the TestLogin-class
Added handling of OT API authentication and authorization errors for data set creation