Allows http method filtering. UI for it still missing.
fix home screen/dash not filtering results properly
changed http_methods_available into a list instead of a dict + PEP8 formatting
easy quick&dirty method filtering testing (since we have no UI atm)
fill up the home dashboard table header properly instead of just dumping extra spaces in the end

(those extra spaces were getting overwritten with table data when there was data, but due to filtering we can now be in a situation where we have nothing to show, and it looks ugly)
Merge branch 'filterable-http-methods' into develop
removed os.getloadavg(), minor formatting