update Radio Button behavior in Paper Toggle

This is for issue #73 the problem was that the onClick event of the
radio button associated to the toggle was triggered too, I removed the
onClick from the radio button associated to the toggle
Update toggle.jsx
#70 update radio button on toggle

This is for issue #70 the problem was that the onClick event of the
radio button associated to the toggle was triggered too, I removed the
onClick from the radio button associated to the toggle but it wasn't
enough as if the user clicked first the radio button it would change to
true, now it is propperly fixed and tested
Merge pull request #77 from Jersonodev/radioButton_toggle_bug

Radio button toggle bug. Fixes #70.