Add npm dependency.
Update GruntTasks.md documentation.
Implement bitc:fixnode. Update GruntTasks.md to reflect actual procedure.
Move bitc:fixnode:removeaptnode to the very end of bitc:setup because it modifies node itself, which could cause issues.
Merge master into ensure-node-latest.
Fix npm install command.
Add missing this.async() call in bitc:fixnode:installnode.
Remove bitc:fixnode:preexit task, which uninstalled the apt version of node. It seemed to throw off the script, and it was never strictly necessary as n installs node in /usr/local, which preceds /usr in $PATH.
Merge master into ensure-node-latest.