Merge pull request #1 from Enide/feature/nodeclipse-travis

Feature/nodeclipse travis
every commit should be built and result seen (to trigger Travis CI)
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
Merge pull request #31 from Nodeclipse/master

command to open Preferences from View