use nodejs instead of node command if it exists

closes #1449
Merge pull request #1450 from frissdiegurke/patch-1

use nodejs instead of node command if it exists
fixing less imports on windows
closes #1423
init sphinx docs
sphinx theme
activate sphinx theme
docs index page
starting porting installation page
.gitignore for sphinx
more documentation, man reST hurts my brain
okay... wrote an index for help and organized stuff. lets do this!
completed the skeleton files for all the docs
minor changes to docs
moved all installation guides into separate files; finished converting installation section to reST
docs: installing nodebb on the cloud
ported heroku docs
ported cloud9 docs
organized installation guides better
configuring databases, init