Only show HAProxy Traffic when HAProxy is enabled

Without this the /about page throws an exception when HAProxy is
disabled.
Merge pull request #7 from jkv/about-page-haproxy-fix

Only show HAProxy Traffic when HAProxy is enabled
Fir for "n/a / sec" in SQL AlwaysOn views
Various fixes for redis memory analysis

Redis memory analyzer needed love, also added access methods on the
instance and control master/slave checking there.
Merge branch 'master' of https://github.com/opserver/Opserver
Update of fetchSQL to use UTC time

SQL spark charts are configured using UTC dates, while the generating SQL are using localized time.
Merge pull request #11 from patHyatt/master

Update of fetchSQL to use UTC time
Styling fix for Issue #6