Merge pull request #377 from PeterBjuhr/master

Fix problem with parts starting with rests
autocomplete repeat in lyric mode
doc, add Item.end_position()
dont report a time position outside a music expression
smarter way of not adding the current note/chord; report pos 0 on start of music assignment
strip the selection when computing the length of an expression
Merge branch 'master' of github.com:wbsoft/frescobaldi
2.0.14 will be released on March 7
function to remove bar checks

todo: function to add bar checks
wip barcheck insert...
wip improve barcheck insert: make smarter time-based event lists
add Item.music(), returning the complete music expression the item is part of
remove Root and tree()
Item.music_parent() and Item.music_children() in nice shape
small touchup
more event based approach
neater
remove method not really needed
separate out event logic; Event can be inherited of to create much more advanced event handlers/readers
handle grave in events