add util to pull down a cert and its fingerprint
add tests to check tls certs and test data
added ssl stripping test
changed util location
updated tls mitm test for code review comments
formatting- removed file header and spacing
updated ssl_strip to require urls with protocol
formatting- adding spacing between code and imports
made stripping conditions more concise
made better var names
Merge pull request #60 from ben-jones/backport_tests

Backport tests