Append example search path to cope with running in virtualenv (1.8.4) under Linux.
Merge pull request #517 from acwong/master

Append example search path to cope with running in virtualenv (1.8.4) under Linux.
Fix to ensure sheetviews are backwardly compatible with older snapshots
Updated imagen submodule reference
Flags restore_state and restore_events added to measure_response
Cleaned up doc formatting and typos, comments, and whitespace
Declared PatternPresentingCommand abstract for clarity
Merge branch 'master' into pjfranalysis
Added temporary fixes for MultiDict to work with attrtree