Merge pull request #223 from onflow/stable-cadence

Stable cadence

Update built bundle

Update built bundle (#220)

Replace contract source encoding to utf8 (#218)

Call window.close in backchannel dev wallet (#210)

Add Discovery API route (#205)

Add HTTP/POST backchannel support (#198)

build a static bundle

build a static bundle

Merge pull request #176 from onflow/huyndo/fix-initialization

Prevent account initialization from firing multiple times at once