Show please wait message on sign up

When the final Sign Up button is clicked, replace it and the Edit
Details button with a please wait message to prevent it from being
clicked again and to make it clear that something is happening.
Show experiment name in <title>

rather than the less informative “SimpleSignUp”
Don't auto place focus on name field

Some browsers (e.g. IE 11) hide the placeholder text as soon as a form
element is selected. Therefore, on page load an IE user won’t be able
to see what info is being requested in the first box.
Changed wording
Show available times as well as dates on display page

Previously, only the available dates were shown which means a user
would have to enter their details first before being able to view the
calendar. Times are now shown on the main display page.
No longer using placeholder text

since old browsers don’t support it and without the placeholder text,
you won’t know what to type in.
Downgraded to jQuery 1

for backwards compatibility with old browsers (specifically IE 6, 7,
and 8).