Include some background information about the extension, installation
instructions, and release information.

Query the Chrome storage API to get user options for time entry
fields. Replace our hard-coded values with user-entered ones.

This allows the extension to work for others without requiring
modification of the source code.

In order to be able to pull the options, I had to move the main
extension code into a callback function that can be passed to
`chrome.storage.sync.get`.

Allow a little more breathing room for input content. One option was too
large for the input, which is why I'm increasing the width.

I had copied this line directly from the Chrome Extension Options page
documentation, but it looks like it has a typo. Fix the syntax error.

Give ourselves the "storage" permission to enable us to save and
restore user options.

Code to save and restore options.

Modified from the options code example shown here:
https://developer.chrome.com/extensions/optionsV2

Having trouble here as I'm getting an error on `chrome.storage` is
undefined. Not sure what's going on with that. Committing what I have
and will have to keep investigating the problem.

Copy the padding style from the example on the Chrome developer page
(https://developer.chrome.com/extensions/optionsV2) to eliminate the
scrollbar in the dialog.

Create an HTML page to store configurable options. These will be used
as the defaults when auto-filling fields in time entries.