Assembla webhook (code push) support

Add Assembla webhook support.

This feature can be contributed by anyone, through a pull request into the open source webhook processor server

Related original feature request: Add support for Assembla? 路 Issue #31 路 bitrise-io/bitrise-webhooks 路 GitHub

Assembla Code Push webhook events are now supported:

If you need something more please create a new Feature Requests!