Revert "paypro: temporarily disable, with comments."

This reverts commit b6fa32dcfa5e8e127e34bda981cae061ff76e8e4.
paypro: improve PaymentRequest verification using the latest bitcore.
send: fix send view because no one accounted for paypro when adding this input.
paypro: use the latest bitcore bundle.
fix send view indentation: broken by 111dac1a0eeafca40fd29a05536b609b69a3e6be.
Revert "fix send view indentation: broken by 111dac1a0eeafca40fd29a05536b609b69a3e6be."

This reverts commit c75bd233e0bd31bf693462f615801229e2e10284.
Revert "fix send section"

This reverts commit 111dac1a0eeafca40fd29a05536b609b69a3e6be.
paypro: use correct bitcore version in package.json.
paypro: fix merchant overflow.
paypro: implement short merchant names in address box and side box.
package.json: use bitcore v0.1.36.
paypro: use the most recent bitcore bundle.
paypro: fix tx broadcasting with domains as paypro addresses.
paypro: fix failing paypro test.
test: fix Wallet test pertaining to null/0 fees.
Merge pull request #1229 from chjj/paypro

WIP Reimplement Payment Protocol