Rewrote implementation of class SideBar to use QToolBar instead of
KMultiTabBar. We can style the SideBar now easily via CSS and do not
have to ship 3rd party KDE code with LMMS. Also the QToolBar based
SideBar integrates much better into the according widget style.
Furthermore renamed SideBar related classes and files to match new
coding style.
Instead of writing QVector<Plugin::Descriptor> everywhere, mit up
iterators etc. centrally define Plugin::DescriptorList and use it
everywhere.
Additionally made pointers to Plugin::Descriptor and
Plugin::Descriptor::SubPluginFeatures::Key const in various places
so we can use ConstIterator everywhere when iterating through
Plugin::DescriptorList.
Most files and most of the core classes and their methods have been
renamed to match new coding style conventions:
391 files changed, 25400 insertions(+), 25598 deletions(-)
Furthermore splitted some files where model and view classes were
declared or implemented together in the same file.
Should be tested thoroughly as I might have missed renaming some virtual
methods or SIGNAL/SLOT parameters.
