Check base URL validity with new URI() instead of new URL() (fixes #184)
Show JB Workaround info when installed from Google Play
New settings management

* Account settings are now read/set using AccountSettings
* AccountSettings upgrades old account settings when necessary
* Settings v1: use absolute URLs instead of paths and discard principal path
  (required for future implementation of well-known URIs)
Upgrade to HttpComponents 4.3.2, version bump to 0.5.10
Adapted tests
Add SNI support for Android 4.2+ for new API again (fixes #205)
Fix #207 (http not supported #207)

Re-register http factory, as it was removed by accident during refactoring.
Merge pull request #210 from bubak4/patch-1

Fix #207 (regression: http not supported). Thanks @bubak4
Multiple bug fixes

* doesn't try to update address book URL when there is no sync-able address book (fixes #208)
* add test for HTTPS/SNI
Version bump to 0.5.10.2-alpha
Merge upstream