Adding testing theme for #444

This is just a WiP to test a new website template. Taken online from
source referenced in the sidebar footer.

Very nice and clean look, have not had the time to add all features yet
and is only used to demonstrate it.
adding new icon set
Updated testing template

* Removed unneeded template icons
* Added new icon font
* Added icons to navbard
* Added full admin features

Updates #444
Merge branch 'next' into issue-444-theserapher
Adding round statistics
fixing PHP warning
stats template changes
allow simple authentication checks wihtout logout
template updates for new empty content
added registration templates
adding account edit page
adding account transaction view
adding notification account view
adding account invitations
adding API qrcode in account
adding missing JS lib
small update to account-workers
adding hide button to admin panel
minor changes to account-edit
minor fix to contrib hashrates