added sandbox version of similar formula discovery search itself is working, but not as expected
fixed MathJax because they moved to 2.4 and 2.3 cdn link was outdated
more work on similarity discovery.
methods are working, but the result is sometimes far away from expectation #22 is fixed together with #2.
replaced slider for nicer one.
gitModel is now application wide within variable gitPropertiesModel,
added short commit hash value into footer
fixed an issue where user was not attached to formula and application context, once due to that spring security is ignored when obtained in @Async thread and second time it was just missing.