Use the extra information to determine whether we need to process input
at all if plugin is not running anymore.
In FX mixer we now omit starting effects if no data has been mixed to
a certain FX channel. Instead let effects running until they finished.
First of multiple fixes for #267.
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.
(cherry picked from commit 8c9a9dd14c)
