OpulenZ: new logo, some refactoring.
Added two standard paths to file open/save dialog

In particular Desktop and Downloads have been added.
Also introduced a new function to create a file dialog
in order to prevent code duplication.
Merge https://github.com/LMMS/lmms into stable-0.4

Conflicts:
	plugins/opl2/logo.png
Added pitch bend
Add "stutter" capability to the audio file processor.
fix all warnings and add -Werror
Merge pull request #108 from groboclown/stable-0.4

Add "stutter" capability to the audio file processor.
Merge pull request #102 from LMMS/warnings

fix all warnings and add -Werror
increase detuning interval to 0.5 semitones
add -Wno-strict-compare. closes #112
Merge pull request #111 from grejppi/stable-0.4-pitchautomation

Increase detuning interval to 0.5 semitones
Stylesheet, wrench icon, 3osc logo
More icons
Icons.
Merge pull request #114 from diizy/stable-0.4

Graphics update
Integrated new splash screen

Also removed ugly code for displaying translucent splash images.
AutomatableModel: added centerValue property

The optional centerValue property can be used by views to display the
center somehow. It defaults to minimum value.
Knob: draw arc around knob

Initial work on improved knob usability by drawing an arc around knob
indicating current state as well.
InstrumentTrack: set center values for pitch and panning
Knob: draw arc + arc background for all unstyled knobs