Fix connect-src CSP error, refs #13
Merge pull request #14 from calmyournerves/csp-connect-src

Fix connect-src CSP error. Fixes #13. Thanks @calmyournerves
Styling the button. Inspired by #15 from @calmyournerves.
Released version 0.7 - fixes #13 bug and improves styling of the button
Added CSP headers for img-src and frame-src, refs #17