Quarantine event

Initial implementation for #27 

I am not able to figure out why it's not able to read a database from the disk when command line utility works.

sqlite3 /Users/$USER/Library/Preferences/com.apple.LaunchServices.QuarantineEventsV2 'SELECT * FROM sqlite_master WHERE type="table";'

sqlite3 /Users/$USER/Library/Preferences/com.apple.LaunchServices.QuarantineEventsV2 'SELECT * FROM LSQuarantineEvent'

Are working fine - but reading from code again crashes.

P.S.: I am sorry - I have to figure out how can I get rid off  that crontab.
can you move this to `osquery/core` or something? also, there are more users on the system that may not have homedirs in `/Users`. For example:

```
osquery> select username, directory from users where directory != '/var/empty';

+----------------+-----------------------+
| username       | directory             |
+----------------+-----------------------+
| _amavisd       | /var/virusmails       |
| _astris        | /var/db/astris        |
| _clamav        | /var/virusmails       |
| _cyrus         | /var/imap             |
| _geod          | /var/db/geod          |
| _locationd     | /var/db/locationd     |
| _lp            | /var/spool/cups       |
| _networkd      | /var/networkd         |
| _nsurlsessiond | /var/db/nsurlsessiond |
| _postfix       | /var/spool/postfix    |
| _securityagent | /var/db/securityagent |
| _teamsserver   | /var/teamsserver      |
| _usbmuxd       | /var/db/lockdown      |
| _uucp          | /var/spool/uucp       |
| _www           | /Library/WebServer    |
| admin          | /Users/admin          |
| cpe            | /private/var/cpe      |
| daemon         | /var/root             |
| marpaia        | /Users/marpaia        |
| root           | /var/root             |
+----------------+-----------------------+
```