Initial draft of DMI formalisazion

for extended interface description of DMI output and input
Merge pull request #182 from openETCS/Hazard-and-Risk

First draft of Hazard and analysis report
issue #161
Merge pull request #183 from openETCS/Hazard-and-Risk

D-4-2-3  	Updated references and section document structure, as well as minor design changes
Merge pull request #184 from openETCS/Hazard-and-Risk

Changed the D4.2.3 to folder Reports
Renaming to "Hazard and Risk Analysis Methodology"

The Safety-Plan was renamed according to the decision taken on the 1st. Internal Assessment Workshop to "openETCS Hazard and Risk Analysis Methodology"
Renaming Safety Plan
cleanup
Merge pull request #185 from openETCS/DMI-formalisation-draft

Initial draft of DMI formalisazion
Merge pull request #186 from openETCS/master

cleanup