GMail-app-style generated colorful one-letter contact pictures for pictureless contacts
Changed hash based color calc to a hash indexed palette as discussed in the pull request.
Bugfix for negative modulo result indexing the palette array
Caching also the calculated anonymous bitmap as proposed by maniac103. This removes a lot of code for special handling unknown contacts.
Added more finer characters as proposed by cketti
Fixed NPE found by blackbox87 ... thanks pal!
Using Android proposed colors as contact color palette now: http://developer.android.com/design/style/color.html
Changed the fallback char from 'K' to '?'. The riddler was here ;).
Add an actionbar item for "add account" to the account list (if there's room)

This should be backported to 4.4
Ask SQLite for a simpler calculation when counting unread messages. The docs imply this is a decent perf win. I'm seeing at least a bit of one
Convert OpenMode from an Enum to static ints for perf improvement.
(Based on profiling of long folder list opens)

This should be backported to 4.4
Merge pull request #353 from sfuhrm/gmail-style-user-pics

Gmail style user pics, 2nd try

* sfuhrm/gmail-style-user-pics:
  Changed the fallback char from 'K' to '?'. The riddler was here ;).
  Using Android proposed colors as contact color palette now: http://developer.android.com/design/style/color.html
  Fixed NPE found by blackbox87 ... thanks pal!
  Added more finer characters as proposed by cketti
  Caching also the calculated anonymous bitmap as proposed by maniac103. This removes a lot of code for special handling unknown contacts.
  Bugfix for negative modulo result indexing the palette array
  Changed hash based color calc to a hash indexed palette as discussed in the pull request.
  GMail-app-style generated colorful one-letter contact pictures for pictureless contacts

Conflicts:
	src/com/fsck/k9/activity/misc/ContactPictureLoader.java
	src/com/fsck/k9/fragment/MessageListFragment.java
Updated Japanese translation of the changelog.
HTML tag cleanup

Effective with earlier commit e2c5229e854e2ef62585f919a15660cba2489b04,
messages are wrapped with <html> tags at display time, rather than
when messages are saved.

For consistency, this commit removes tags from a status message, because
they, too, will be added back at display time.

Closes pull request 286.
Close stream when done (StrictMode error).
bug fix: use "1" not "true" for SQL boolean

Ref:  Pull request #355 from @edemaine
Merge branch 'master' into UpdatedFinnishTranslation