Merge pull request #85 from npm/install

display stable npm version and installation instructions in footer
update enterprise/whitelist
add enterprise/server-configuration
Merge pull request #96 from linclark/add-server-configuration

add enterprise/server-configuration
Merge pull request #97 from linclark/update-whitelist

update enterprise/whitelist
update enterprise/updating

Fixes #61
Merge pull request #98 from linclark/update-update

update enterprise/updating