Fairly large overhaul of the JuK codebase to beat out a lot of the Qt 3 stuff.

Fairly large overhaul of the JuK codebase to beat out a lot of the Qt 3 stuff.

Still a lot of Qt 3 code to go but at this point Q3ValueList, Q3Vector, Q3PtrDict and
Q3Dict should all be gone.

In addition many loops have been foreach()'ed, which really does make it more readable.

There is a crash fix as well, now the polish() function in Playlist has been replaced
with an initialization slot which is singleShot'ed since the timing of the polish event
is apparently different than it was in Qt 3, which was making new Playlists crash when
they were first shown.

Also I went through almost every header and pared it down to the minimum reasonably
achievable, which required some additional headers in a few .cpp files but overall
compilation time should be down and you won't have to rebuild all of JuK just because
a header file got touched.

I haven't seen any regressions yet but then again I still can't play music either.

git-svn-id: svn://anonsvn.kde.org/home/kde/trunk/KDE/kdemultimedia@667815 283d02a7-25f6-0310-bc7c-ecb5cbfe19da