Only remove oldChild if it's not null
Merge pull request #83 from scompt/child_reuse_crash

Only remove oldChild if it's not null
Two item view wrappers: checkable and non

So that setActivated() will be called on items that
are not checkable when some choice mode is enabled.
Fix #82: choice mode with non-checkable

Merge branch 'master' into checkable
Add git version tags
Merge branch 'master' of git://github.com/bauerca/drag-sort-listview

* 'master' of git://github.com/bauerca/drag-sort-listview:
  Add git version tags
  Two item view wrappers: checkable and non
  Only remove oldChild if it's not null