Issue 482: PropFind::set() hard adds properties during ALLPROPS

See Issue 482. Properties handled on propFind with PropFind::set() were
not being added to an ALLPROPS response, even though that would be
expected. Ensure that any properties being added through set() are added
to an ALLPROPS response.
Browser plugin: sort by type first, then display path.

The SabreDAV browser plugin previously displayed all entries in no
particular order. To make the list easier to digest for the end user,
sort all nodes based on their type (collection yes/no) first, and their
display path second.
Merge pull request #485 from aklomp/browser-sort

Browser plugin: sort by type first, then by display path.
Merge pull request #486 from aklomp/issue482

Issue #482: PropFind::set() hard adds properties during ALLPROPS
Updated changelog.
Set the release date. This is the final release.
vobject note.
Merge branch '1.7' into 1.8

Conflicts:
	ChangeLog
Merge branch 'master' of github.com:fruux/sabre-dav
Merge branch '1.8'

Conflicts:
	ChangeLog
Merge branch 'master' into calendar-auto-schedule