Add group support via VCard CATEGORIES (closes #48)
Version bump to 0.6.1; show exceptions from resource detection (see #284, see #286)
Don't check capabilities on principal URL but on calendar/address book home set (fixes #286)
Move resource detection to separate class + tests
VCard 4 support detection; new ez-vcard version

* detect CardDAV VCard version support using supported-address-data + test
* account setting for supported VCard version
* don't ask for calendar details when querying CardDAV collections
* don't ask for address book details when querying CalDAV collections
* ez-vcard update to 0.9.5 (fixes #268), adapted exception handling
* refactoring: unnecessary DavProp prefixes removed
Don't require capabilities on home sets that MAY not be available on these collections (fixes #289)
Merge branch 'master' of https://github.com/rfc2822/davdroid

Conflicts:
	src/at/bitfire/davdroid/syncadapter/QueryServerDialogFragment.java