bug 826564 Add exploitability to reports_clean
Backill and update functions for exploitability

* Add crontabber jobs for matview
* Add backfill and update functions for daily exploitability rollup
Fixed minor typo in installation docs.
Merge pull request #1277 from selenamarie/bug826564-exploitability-sql

bug 826564 Add exploitability to reports_clean
bug 826564 Add signature to exploitability report
Adding a new signature summary report.
Merge pull request #1281 from selenamarie/bug826564-add-signature-column

bug 826564 Add signature to exploitability report
Merge pull request #1282 from brandonsavage/signature_summary_middleware

Adding a new signature summary report.
bug 871056 - remove apache2 restart on reinstall until we figure out why it is failing on jenkins
Merge pull request #1283 from rhelmer/bug871056-apache2-intermittent-failure

bug 871056 - remove apache2 restart on reinstall until we figure out why...
Fixes bug 872223 - Added a field service to return data_dictionary information. r=peterbe
Merge pull request #1284 from AdrianGaudebert/872223-fields-service

Fixes bug 872223 - Added a field service to return data_dictionary infor...