[FIXED] Unlock screen.
[FIXED] Internal fixes.
[ADDED] Avatar selection in preferences.
[ADDED] Implementation of the other preferences.
[IMPROVED] UI of unlock and preferences screens.
[REMOVED] Stop using apptentive for rating questions. Pearl's
built-in functionality seems nicer and more basic.
[ADDED] Some more tool-tips to help the user, to be shown on first
run only.
[FIXED] The site name tip wasn't showing anymore.
[FIXED] Some language and formatting in help.html.
[FIXED] Immediately open the application on the password entry view
if the key is forgotten instead of revealing the internals
in a blink.
[FIXED] Clean up the UI better when switching between master
passwords.
[ADDED] Ask spelling confirmation when a master password is used
that doesn't have any known sites yet.
[ADDED] iPad HD quality icon.
[IMPROVED] Artworks re-generated, downscale improved, convertImages
improved.
[IMPROVED] Small guide text improvements.
[UPDATED] Help texts updated for current operation and UI.
[ADDED] OS X: Master password input and changing.
[ADDED] OS X: Autocompletion by searching Core Data for previously
used sites.
[ADDED] OS X: Working password generation for sites.
[FIXED] Bad ciphering on little endian machines: Convert bytes to
network endian before using them as numbers.
[FIXED] Opening of Core Data store when iCloud is unavailable.
