Docker & doc fixes for node, pwd, etc

Revert changes to WORKDIR in Allura/Dockerfile from recent broccoli/jsx setup
commits.  Its needed to have the 'web' container start in the root folder, so
`pip` command etc works.

Update docs to take advantage of the 'taskd' container starting in Allura
subdir so paster commands can run without "bash -c 'cd ...'" stuff.

Use newest version of node/npm to avoid symlink errors when installing
npm packages within a VM shared mount.

Add instructions for running administrative commands within docker.  Add
success logging at end of create-neighborhood so that some thread widget
errors don't make people think that command failed.
5 files changed