align internal sends using delaylines
NOOP, re-indent using tabs
fix possible crash when setting delivery name w/o panshell
add latency callback to dummy backend
delayline: properly hand-over the shared-pointer.
add initial (untested) implementation of canvas ruler item
clamp zoom level to show 3 days on a 4000 pixel wide screen; comment unused variable for now
add Ruler to Canvas fwd.h
add ruler.cc to canvas wscript
many fixes and improvements for a now-working ArdourCanvas::Ruler item
use canvas rulers now instead of gtk widgets

Some bugs that exist in master are still present.
remove gtk ruler widget implementation - no longer in use
final ruler file removal
remove header file includes of now-removed gtk custom ruler
remove header file includes of now-removed gtk custom ruler
OS X specific cleanup after canvas ruler introduction
remove unused GTK style
removed unused rule GTK widget style definition
add new default colors for canvas rulers
remove hard-coded colors