Minor changes to Windows build and packaging

With these changes we link statically against libusb and libdivecomputer
but don't add the .a files to our installers.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Add possibility to filter by more than one criteria at a time

This new version of the TagFilterSortModel actually accepts
*any* new MultiFilterInterface.

So, how to use it to create a new filter:

Implement a class that inherits from MultiFilterInterface

Implement the filterRow method

TagFilterSortModel::instance->add( myClass );

and you are done.

[Dirk Hohndel: removed some debug code and did whitespace cleanup]

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Don't use switch with just one case

This should be an if statement.

Gets rid of build warning.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>