[qtcontacts-sqlite] Build with either qt4 or qt5

Also switch to using sqlite backend for all tests, and remove some
irrelevant testing code.
[qtcontacts-sqlite] Remove irrelevant test code

Some of the test code in this project is derived from QtMobility Contacts,
and tests behavior which is not relevant to the sqlite backend.
Merge pull request #13 from matthewvogt/qt5-port

[qtcontacts-sqlite] Build with either qt4 or qt5
[qtcontacts-sqlite] Handle ID conversion correctly

Pass the ID value correctly through toString/fromString.
Merge pull request #14 from matthewvogt/id-format

[qtcontacts-sqlite] Handle ID conversion correctly
[qtcontacts-sqlite] Fix plugin generation for qt5
[qtcontacts-sqlite] Support QContactName::customLabel with qtpim

No longer an official field in qtpim, but the backend supports it.
Merge pull request #15 from matthewvogt/custom-label

Custom label
[qtcontacts-sqlite] Fix Qt5 dependencies.
Merge pull request #16 from martinjones/master

[qtcontacts-sqlite] Fix Qt5 dependencies.
[qtcontacts-sqlite] Add missing dependency on qt5-plugin-sqldriver-sqlite
Merge pull request #17 from special/master

[qtcontacts-sqlite] Add missing dependency on qt5-plugin-sqldriver-sqlite
[qtcontacts-sqlite] Fix debug message
Revert "[qtcontacts-sqlite] Remove check for IsNot relationships"

This reverts commit 50d0d5c838b4aab51e026dc36cabfaac0ee7b850.
[qtcontacts-sqlite] Respond to relationship changes

If changes to relationships cause constituent contacts to become
disaggregated, or aggregates to become childless, then remove or
generate new aggregates as required to maintain order.
Merge pull request #18 from matthewvogt/rel-changes

[qtcontacts-sqlite] Respond to relationship changes
[qtcontacts-sqlite] Fix variant comparison for Qt5
[qtcontacts-sqlite] Fix some terminology usage
[qtcontacts-sqlite] Exclude relationships for internal queries

When reading contacts during processing of requests, exclude
relationship data which is expensive and unused.
Merge pull request #19 from matthewvogt/cleanups

Cleanups