app: previous commit broke the application, fix and enhancement.
app:
* fixed task sort
* added initial work on records
* initial work on location awareness task list.
app:

* better tasks comparator, now support location relativity, testing
needed though.
* some refactoring to the TasksAdapter class.
* Initial work on the tasks service.
app:
* fixed a tiny bug introduced in the previous commit.
=== App:
* Incomplete work on the tasksIntentService.

=== Presentation:
* Tweaked two slides.
* Added some speech.
mostly ready!
* huge work on the adapter.
* we now use webview to display tasks discription.
* Added some fake tasks to show.
App design tweaks

relocated the presenter into a service who controls the adapter of the
TasksListFragment.