Added object names for transport buttons (for theming purposes), fixed alignment issues on track labels
Retouched transport icons, commented stylesheet for better documentation, fixed faint line in bitinvader knob
New files
Merge pull request #190 from diizy/stable-0.4

UI: small fixes, improvements, clean-up & requested changes
Merge pull request #186 from softrabbit/stable-0.4

OpulenZ: LGPL added in sources, a handful of presets added
Merge https://github.com/LMMS/lmms into stable-0.4