ensure the flush at startup of an existing write queue does not flush items multiple times
fix bug whereby an array read could occur before pending writes and clobber those writes
add log line for unexpected condition of replacing a dirty, pending entry with a clean entry
Merge branch 'existing_write_queue_bug_fixes'
Merge branch 'master' into race_conditions
properties added to an instance after saving but before an http response is returned should be preserved
Bump version to 0.7.8