Github actions

[kerautret]

PR Description

• [X] Build base tools
• [X] Random build and whitelist check
• [x] Doc build
• [x] icon Status
• [x] PR Template
• [x] Travis conf remove

Checklist

• [ ] Doxygen documentation of the code completed (classes, methods, types, members...).
• [ ] Main tool doxygen documentation (following existing documentation of DGtalTools documentation.
• [ ] Check if it follows the tools structure described in CONTRIBUTING.md
• [ ] New entry in the ChangeLog.md added.
• [ ] Update the readme with potentially a screenshot of the tools if it applies.
• [ ] No warning raised in Debug cmake mode (otherwise, Travis C.I. will fail).

[dcoeurjo]

Let's merge and we'll see...

[dcoeurjo]

Let's merge and we'll see...