Remove depencendies necessary to build docs from package.json and
specify them in the readme. Due to difficulty managing dependencies
for nomnoml on different platforms, this reduces dependency requirements
to only those needed for building the package.
Add in-line docs for bundle platform/commonUI/browse,
which implements Browse mode, one of the common user
interface bundles being transitioned in WTD-574.
Add in-line documentation to TreeNodeController, and update
glossary with some clarifying definition.
Additionally, change name from tree-item to tree-node for
consistency.
Part of ongoing transition of commonUI bundles, WTD-574.
Add top level README file describing, in broad
terms, the structure of the project. In particular,
this documents the naming conventions which support
build and test, and provides a short summary of how
these both run. WTD-519.
