Merge pull request #1 from lejlot/master

Added alpha version of CLI support.
Merge branch 'master' of https://github.com/lejlot/biotrack into lejlot-master
Half-way updated to pcl-1.7 and qt5

It looks like pcl-1.7 has API changes that affect us,
and pcl-1.6 has macro's that do not play nice with
qt5's moc. So we're stuck at pcl-1.6 and qt4.

The committed changes are backwards-compatible with
qt4 (with warnings about the new Qt5 option "widgets")
but should make us slightly less unprepared for the
upgrade when it arrives.
Tweeked Backgrounder

Delayed object creation in main.cpp so we don't have to delete
the object if we're not using the average method

Added printf's in BackgroundCalculatorMode.cpp so we know it's
not frozen. Should be more useful in batch mode.
Updated README.txt to point to github wiki

Old wiki is being removed.