fix broken links

[arlin]

@epontell writes the following:

Looks good, except that the Download links on the left do not work for me (including the View on GitHub link).
The links in the evolutionary database interop (2009) hackthon are broken. I am not sure how to go in and check them, but:
· Top link should be https://nescent.github.io/community-and-code
· Use cases (I believe) should be https://evoinfo.nescent.org/Database_Interop_Hackathon/Use_Cases
· The target projects links should be https://evoinfo.nescent.org/Database_Interop_Hackathon/Target_Projects
· Link to list of final subgroups should be https://evoinfo.nescent.org/Database_Interop_Hackathon/Subgroups

Other links with problems:
· The GMOD Evo Hackathon has a link for “list of objectives” that seems to point back to the same page. The link should be http://gmod.org/wiki/GMOD_Evo_Hackathon#Specific_objectives

[hlapp]

All fixed. The download link not working was presumably due to lack of access permission, which I corrected as well. @epontell please reopen if that issue persists.

I made the fixes on the master branch and then pulled them over to gh-pages. It's not clear to me why we even have everything in two branches, so opened #2 for that.