Code that tries to use getAllXMessageIds and then falls back gracefully to getAllXMessages if it can't
Thread-safe alerter to send messages from background threads.  Closes #35
Merge branch 'master' into testIncrementalLoad

Conflicts:
	lib/message_store.rb
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Merge branch 'master' into testIncrementalLoad
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Merge branch 'master' into testIncrementalLoad