0.9.0, UI improvements, faster exporting, add/remove tags, scrub/delete data

- Exports should be between 2x-5x faster
- Added actions menu for search/sessions
- Scrub and Delete actions, user must have remove right enabled (issue #119, issue #89)
- Add/Remove(remove right required) tags actions
- Hourly rotation (issue #122)
- unique.txt fixes (issue #123)
- Actions can be done on linked sessions (issue #120)
- SPI Graph auto refresh (issue #111)
- Better error handling for SPI data display (issue #109)
- List queries using [] syntax (issue #106)
- user prefs with timezone display (issue #95)
- Basic IRC searches
- Disk Queue stats display