add section about submitting useful bug reports
remove ReviewIdentitiesActivity

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temporarily disable encrypted backup

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Merge pull request #1631 from mcginty/disable-encrypted-export

temporarily disable encrypted backup
Fixing race condition and other mistakes. Fixes #1603.

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Merge pull request #1630 from mcginty/remove-keys-list

remove ReviewIdentitiesActivity
Remove unused files.

Fixes #1522

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Replace XML serializer in plaintext export

Fixes #342

- using regex pattern/matcher to escape chars below 0x0020 and
  above 0xd7ff
- using String.Replace to escape XML entities
- changed XmlPullParser from Xml.newPullParser() to
  XmlPullParserFactory parser to fix import on GB
Revert "change out key cached icon to be more unique"

This reverts commit d6d76fa95315068ab5457b23fb4908c4a8586982.
no longer load a recipient for each filter text

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Merge pull request #1642 from mcginty/canonical-bunk-addresses

don't try to load recipients for each filter text
Merge remote-tracking branch 'upstream/master'