[DO NOT MERGE] Added datetime, changed the polling model to backoff and retry when slot found, made messaging little more descriptive.

[canturkisci]

Please do not merge yet, as this is a subsequent PR to PR #11 .

Please also see the Critical Change below, which proposes to change program execution model.

Minor Changes

• Added datetime info so we can track when refreshes happen.

Critical Change

• Changed program behavior to back off for two mins, and retry, if Open Slot found
• This is because, 9 out of 10 times I found an open slot, by the time I could commit the transaction, the slot disappeared.
• When this happes, the driver terminates and we have to restart the selenium harness from scratch, which means signing in again and navigating to the pages.
• Instead, I am proposing backing off for 2 mins, and then either manually terminating via CTRL^C or letting it continue refreshing if commit fails.
• The downside is, if you spend more than 2 mins to commit the transaction, it will autorefresh on you.

Alternatives

Another way to break the tie is to either grab a signal or wait for a continue/abort prompt from user once Open Slot is found and user tries to commit. We can create an issue and punt this PR in favor of that issue.

[canturkisci]

I created this PR to upstream some minor changes i did to make things easier on my end. Please feel free to counter or punt as you see fit.

[tangerinehuge]

You could just send it into a long sleep or a notification loop once a slot is found so you don't risk an autorefresh.