Need wider support of Mercurial in Fabric8

[jmlambert78]

We are connecting HG to fabric8 within the workflows. (jenkins level) but need to go further in the integration. The jenkins/Docker & JNLP works well for that. Features that seem to be necessary :

• Ability to get the pipelines from HG/GIT indifferently
• Ability to specify some HG or GIT for the different steps : tagging, updating files, etc in the workflow
• Ability to enrich the GUI with the HG option (when creating a new app)
• Ability to Edit source code (lower priority) in the GUI
• Abilty to get the change history (low priority) in the GUI

I open this issue after conversation with Jrawlings today. Hope people can enrich the requirements and give opinion on the best way to do it. We can contribute to dev/qa/deploy checks on our side if this is possible. Thx

[gashcrumb]

On the UI front, I think all the calls to source control happen via this file client-side, which is handled by fabric8-forge: https://github.com/fabric8io/fabric8-console/blob/master/plugins/wiki/ts/wikiRepository.ts#L22