* work-around for crash when remote ETag is empty (shouldn't happen but happens sometimes)
* fetch multiple contact URLs (not only the first one) from contacts provider (fixes#150)
* support primary (preferred) phone numbers/email addresses
* fix (crash) bug in URI sanitation
* don't set calendar properties not supported by device's Android version
* require already-set remote file name when finding updated records
* version bump to 0.5.6α
Docs say that TransactionTooLargeException is thrown when the buffer reaches 1 MB. Because we can't know
how large a single insertion/update is and there may be contacts with larger photos, it's only safe to
commit after every insertion/update. If photos exceed ~ 900 kB it would be required to write the photos
to an asset file (maybe I'll do this later, then we can group insertions/updates again).
* update target SDK version to API level 19
* less null return values
* explicit Resource generateUID/generateName methods
* use StringUtils when it makes sense
* add overflow marker "…" to LoggingInputStream
* split the populate() methods
* always close cursors (resolves#120)
* introduce LocalStorageException and its subclass RecordNotFoundException and catch RemoteException earlier
* split synchronize() method into phases
* commit after every added/modified record (obsoletes MAX_UPDATES_BEFORE_COMMIT)
* read contact photos from (high-res) asset instead of the thumbnail blob (resolves#121)
* write PRODID with DAVdroid and ez-vcard version to VCards
* remove limit of 1 for contact Web sites in contact EditSchema
* add organization to contact EditSchema
* don't set null values in ORG/ROLE
* check Android's DURATION, RRULE, RDATE, EXRULE, EXDATE values for empty strings before processing
* catch InvalidArgumentException on invalid RRULE values from Android
* add Depth: 0 to REPORT multi-get requests as required by CalDAV/CardDAV RFCs
* fix crash bug on multi-get responses without content (see issue #113)
* switch to ez-vcard instead if iCal4j-vcard
* generate VCard 3 by default (fixes#67)
* support for more phone number/email/address types, including "custom" types
* limit to 1 URL and 1 note (Android limit)
* support for anniversaries
* allow to enter account name at the end of account setup (fixes#13)
* advise user to enter email address as account name (closes#24)
* support for iCal TRANSP (availability free/busy field)
* create better UIDs using iCal4j UidGenerator and Settings.Secure.ANDROID_ID
* better ORGANIZER/ATTENDEE support, but there are big Android issues yet
* various improvements and bug fixes
* use DURATION instead of DTEND when required (fixes#60)
* send VTIMEZONEs along with VEVENTs (fixes#66)
* support for reminders (closes#70)
* bug fixes (UID parsing)
* use SDK level 19
* add action to all preference intents (fixes#92)
* use StrictHostnameVerifier instead of HttpsURLConnection.getDefaultHostnameVerifier() (fixes#88)
* use per-WebDavResource instead of static DavHttpClient to enable different settings for different accounts
* don't manually decode URLs for comparing (because we now always use encoded URLs)
* .ics: VERSION before PRODID
* refactoring: move WebDavResource.httpClient to new singleton DavHttpClient
* close input streams in propfind/multi-get
* version bumpt to 0.4.1
