Merge pull request #261 from jfaltermeier/master

Fixed #260
New high level architecture overview based on block diagram
Extended profile for blocks and associations
Merge pull request #265 from srieger/master

New high level architecture overview based on block diagram
Roadmap First draft
documentation added to the first Roadmap draft
New Tool chain Overview
Spec for ProR-based Traceability
updated roadmap and overview diagram #248
Merge branch 'master' of github.com:openETCS/toolchain
Roadmap folder organization
Add Papyrus (View Stylesheets) and Papyrus Tabular Editor #267
Add lifecycle of the tool chain in the tool chain dev plan