Link to UCSC Genome Browser now has a more proper implementation. Still todo
is error checking and such.

It uses the same infrastrucure as the position converter and is thus also
limited to variants on transcripts with c. notations.


git-svn-id: https://humgenprojects.lumc.nl/svn/mutalyzer/branches/browser-link-branch@390 eb6bd6ab-9ccd-42b9-aceb-e2899b4a52f1