Buying with bitpay prompts user to pay multiple times

[radiumsoup]

Even if a user has already made a bitpay transaction but it has not yet confirmed, reloads of the page prompt the user to pay for the bitpay transaction again, although with a caveat "don't pay more than once"

[radiumsoup]

Fix Issue #1

Fix broken API call to deprecated source, refactor javascript to parse unconfirmed transactions properly and discard confirmed transactions from the unconfirmed list, changed descriptors on previously unknown unconfirmed table on front page to make more sense to laymen reading the site. Performed test bitpay transactions successfully, and double popup of modal is not occurring any more.

→ <<cset d5fce8904039>>

[radiumsoup]

Merged in dev (pull request #8)

Fix Issue #1

→ <<cset 51d7214a4e78>>