added undo/redo-system and other features

git-svn-id: https://lmms.svn.sf.net/svnroot/lmms/trunk/lmms@104 0778d3d1-df1d-0410-868b-ea421aaaa00d

TODO

@@ -1,16 +1,20 @@
+- add edit-history to project for making it possible to undo things even if you did them in a previous session
+- make edit-history qobject and undo/redo slots -> direct connection to GUI
+- restore stacking-order of windows when loading project
+- fix MIDI-import-filter
+- bristol-bindings
+- resample sample-track-tcos when using hq-mode
 - add support for panes-interface (like blender) (instead of MDI etc.)
 - message when importing unsupported MIDI-file (track-count = 0)
 - volume-knobs for each sample-track
-- AMS-bindings
+- AMS/OMS-bindings
 - remove binary-embed-system
 - recording-functionality
 - show loading-vst-hint when cloning vestige-track
 - do not hang when saving while loading VST-plugin
 - tempo-recogn. and sync of beat-samples
 - do not quantize when importing from MIDI-file
-- KNOB-setValue!!!
 - separate GUI and data/sound-processing-code
-- fix qtimer-problem /channel-activity-LEDs
 - make color-scheme switchable: LMMS / user
 - autosave every 30s (configurable!) and offer recovery at startup after crash
 - make piano-roll use rubberband instead of implementing a simple one on it's own
@@ -25,7 +29,6 @@
 - pre-listen when opening sample with QFileDialog
 - panning-editing in piano-roll
 - speed up painting of sampleTCO
-- save window-positions, -states and -sizes in files
 - solve problems with different keyboard-layouts when playing channel-track with pc-keyboard -> use tr()
 - panning env+lfo
 - plucked-string-synth: knob for metallic -> use noise as wave-shape
@@ -41,7 +44,6 @@
 
 
 - effect-board -> live-fx from input
-- event/automation-system
 - chord-editor?
 - WAVE/OGG/MP3-Import -> FFT-analysis -> write notes
 - FLP-Import