Add first version of downloads page for custom Ice builds
Fix icegen argument parsing
Fix x86 downloads substitution
Remove unnecessary </div>
Now really fix x86 substitution
Replace buttons by hyperlinks
Remove trailing ;
Use lowercase for source code hyperlinks
Use Source code  everywhere
Merge pull request #109 from sbesson/rebased/develop/ice_downloads

Add downloads page for the custom Ice builds (rebased onto develop)