Allow to get the tuplet doubling state from a proxied measure.
Allow tuplet doubling to persist across measures.
Properly handle doubled tuplet termination in another measure.
Add a test case for doubled tuplets across multiple measures.
Merge branch 'master' into tuplets
Handle partial measure simile inside of doubled tuplets.

For now, limit the tuplet ttl if a partial measure simile appears, and
calculate the new ttl after the simile.  Add a test case.
Check lilypond output for nested tuplet test as well.
Keep related code together (thank you lambda).
Make clang happy._
Cleanup.
Add missing switch cases.
Merge branch 'tuplets'