basic_filters.h: Saner limits for frequency
sf2_player: fix #481
Do not display ENV/LFO tab in plugin window if controls are disabled in it (SF2 Player and OpulenZ)
Dual Filter fix: make more efficient -  don't calculate coefficients unnecessarily
Change Linux Multimedia etc. to LMMS in desktop/package files
Merge pull request #487 from diizy/stable-0.4

Dual Filter fix: make more efficient -  don't calculate coefficients unn...
Merge pull request #484 from grejppi/stable-0.4-sf2velocity

Fix for #481
Merge https://github.com/LMMS/lmms into bug468
basic_filters.h: Tweaked limits for cutoff.
GraphModel: fix/improve normalize() function - remove bias before maximizing, also add some new slots for future use (which I plan to use for something neat in the future ;) )
Merge pull request #492 from diizy/stable-0.4

GraphModel: fix/improve normalize() function - remove bias before maximi...
Desktop file modification to correct ubuntu behavior, icon file copied to data/ as lmms.png because it's needed for packaging
Merge pull request #494 from diizy/stable-0.4

Desktop file modification to correct ubuntu behavior, icon file copied t...
Removed obsolete pch.h include
AutomatableModel: coding style improvements
AutomatableModel: avoid hiding virtual functions by overload
AutomationPattern: define constants outside class declarations
ControllerView: remove unused member variable
ModelView, Model: coding style improvements
SerializingObject: made saveSettings() and loadSettings() pure virtual

All classes inheriting from SerializingObject should also provide
according functionality, therefore ensure, they implement methods for
loading and saving settings.