command: Get command, not functional yet. Converted to use modules.
command: Get works
command: get supports -update
terraform: modules are put into the graph
terraform: Graph, Context, Plan all speak modules
terraform: State.String outputs multiple modules
config/module: proper name for root
terraform: update graph to build subgraphs for modules
terraform: error if subgraph fails to build
terraform: remove Read/WriteDiff, we don't use it
terraform: diff is split down into modules
terraform: walkContext
terraform: basic sub-module walks work

Lots broken still, but its a start.
terraform: plan with modules work
terraform: fix copying dependencies
terraform: module orphans
terraform: outputs should be properly calculated for modules now
terraform: module output variables are functional
terraform: module w/ computed output works
terraform: variables to modules work