Update documentation/index_vm.html

Updated description: removed reference to "Upper Midwest" in title, updated models supported, added model references. Minor changes to prose.
Update documentation/index_vm.html
Merge remote-tracking branch 'upstream/master'
added ED2IN templates for revisions 46 and 82
Merge pull request #7 from dlebauer/master

updated documentation/vm_index.html; added ED2IN templates for r46 and r82 to models/ed/inst/