Factor out sequencing related things into an independant new library: "evoral".

Anything related to the storage of events/values over a range of time lives in evoral.
This includes MidiModel (Evoral::Sequence) and automation data (AutomationList (Evoral::ControlList),
	Automatable (Evoral::ControlSet), etc).
libs/evoral synced with http://svn.drobilla.net/lad/trunk/evoral r1511.


git-svn-id: svn://localhost/ardour2/branches/3.0@3754 d708f5d6-7413-0410-9779-e7cbd77b26cf

libs/surfaces/control_protocol/SConscript

@@ -38,6 +38,7 @@ cp.Merge ([
     libraries['sigc2'],
     libraries['pbd'],
     libraries['midi++2'],
+    libraries['evoral'],
     libraries['xml'],
     libraries['glib2'],
     libraries['glibmm2']