add a contribute section

hello,

we need a development section that will link to the real development doc maybe with a little explanation

• development -> line vers doc de development

Cheers

created branch 30-add-a-development-section

changed title from add a development section to add a contribute section

closed via commit 8569d435

mentioned in commit d1f98041

added Added label

changed milestone to %FusionDirectory 1.3.1

reopened

mentioned in commit 55424823

mentioned in commit 72cbe267

added 2h of time spent at 2020-02-20

removed user-manual label

added PJ2003-0342 label and removed PJ1802-0188 label