Merge pull request #28 from Enide/feature/nodeclipse-travis

update version (with mvn command); add Help page "How to add Eclipse Help"
Fix build issues
A CSS that looks more like GitHub.
Merge pull request #29 from olvlvl/css_like_github

OK I trust your CSS skills ;-)
command to open Preferences from View
Merge branch 'master' of https://github.com/Nodeclipse/gfm_viewer