WIP-MEI: Formatting: Fixed formatting in a few tests
WIP-MEI: Testing: Rewrote the noteFromElement() unit tests (step 1 of 2)

Fewer and more meaningful tests. Integration tests still to come!
note.lyric._setTextAndSyllabic, no longer private
WIP-MEI: Testing: Rewrote the noteFromElement() integration tests (step 2 of 2)
WIP-MEI: Formatting: Clean up noteFromElement() a bit

I just reordered some things and updated the docstring in accordance with the
new tests.
WIP-MEI: Add two TODOs
WIP-MEI: New: noteFromElement() and chordFromElement() support @grace

Grace notes and grace chords will be appropriately marked as such. In accordance
with music21's MusicXML importing, the notes/chords have 0.0 duration, rather
than "borrowing time" from a neighbouring note, which is a concern of the MEI
Guidelines.
byte error analysis/phrasing; add Lyric.rawText()
fix small bug in abcFormat/__init__.py

5.0 -> 5
print statements replaced by function calls

replaced print statements in various demos with print function calls for
python 3 compatibility
Merge pull request #64 from senritsu/master

print statements replaced by function calls
Merge branch 'master' into mei
WIP-MEI: Delete unused function that recursively searched a Stream

This function was part of an abandoned attempt to add slurs to objects. It's not
used any more, so it's removed.
WIP-MEI: Rewrote _addSlurToThing() as addSlurs()

This function is more robust, not module-private, and actually tested. Plus,
now the Element and Music21Object are both passed in, we can change the
slur-handling strategy without necessarily changing other functions.
WIP-MEI: Testing: Modify noteFromElement() Tests for new addSlurs() function
WIP-MEI: Improve status messages in convertFromString()