Small typo and use DOI link to the paper.

I'm not saying that modelica.org is going to change the file structure soon but linking to a DOI reference is far more safe :smile:
Fix typo
Merge pull request #4 from tbeu/fix-typo

Fix typo
revert change of "umlaute"
Fix unicode issue by using fail-safe HTML entities

See also #2 discussion.
Merge pull request #5 from dietmarw/patch-2

Fix unicode issue by using fail-safe HTML entities
Merge branch 'master' of https://github.com/oestersoetebier/IdealizedContact

Conflicts:
	README.md
added download link to v0.1.0
moved Images in Resources folder according to convention
Remove trailing white space
worked on issues #6, #7 #9, #10 and #11
Remove superfluous dummy annotations
removed further illegal modifications of outer parameters
Merge branch 'Remove-trailing-white-space-and-dummy-annotations' of https://github.com/tbeu/IdealizedContact

Conflicts:
	IdealizedContact/package.mo
unnecessary annotations