Added ability to create default global alert rules
Updated default rules
Changed:
	Alerts cronjob to be every minute.

Added:
	Lockfile to Alerts cronjob
Setting default delay to 300 seconds so alerts are every 5 minutes
Set device_id to -1
Updated ability to acknowledge alerts
Updated Docs
Update print-alert-rules.php
Update print-alert-rules.php
Merge pull request #373 from laf/issue-laf-97

Added ability to create default global alert rules
Merge pull request #375 from laf/issue-laf-98

Updated ability to acknowledge alerts
Added dbSchema version to about page
Merge pull request #377 from laf/issue-362

Added dbSchema version to about page
Added git log link to show last 10 commits
Merge pull request #378 from laf/issue-362

Added git log link to show last 10 commits
Merge pull request #374 from f0o/alerting-dirty

Cronjob adjustment & Lockfile implementation
Update about.inc.php

Removed acknowledgements for logo design (no longer used) and drop down menus (bootstrap menus now used).
Added TwoFactor Authentication (RFC4226)
Tested against Google-Authenticator app on Android 4.4.4

Made `verify_hotp` more efficient.

Added autofocus on twofactor input

Added GUI Unlock and Remove for TwoFactor credentials in /edituser/

Allow additional tries after elapsed time from last try exceeds configured parameter `$config['twofactor_lock']`.
If `$config['twofactor_lock']` is not defined or is set to `0`, administrators have to unlock accounts that exceed 3 failures via GUI.

Added Documentation

Moved TwoFactor form to logon.inc.php
Disabled autocomplete on twofactor input field
Updated Docs to include link to Google-Authenticator's install-guides

Moved authentication logic from authenticate.inc.php to twofactor.lib.php

typo in docblock for `twofactor_auth()`

Fixed scrutinizer bugs

To please scrutinizer
Merge pull request #383 from f0o/issue-365

Added TwoFactor Authentication (RFC4226)