Look improvements

From Buzztard

[edit] screenshots of other music software

• http://www.renoise.com/about/screenshots/
• http://www.reaper.fm/feat-ss.php
• http://www.propellerheads.se/products/reason/index.cfm?fuseaction=get_article&article=devices_mclass

[edit] spectrum view

• add grid lines
• colorize? (use a series of borderless levelmeters)

[edit] level meters

• make them rasterized
• always shade background
• make peak markers red

[edit] sequence view

hack themeing to disable focus lines one buttons

 # remove padding, so we fit on small panels (adapted from clock applet)
 gtk.rc_parse_string ("""style "hamster-applet-button-style" {
         GtkWidget::focus-line-width=0
         GtkWidget::focus-padding=0
     }
     widget "*.hamster-applet-button" style "hamster-applet-button-style"
     """);
 gtk.Widget.set_name (self.button, "hamster-applet-button");