added package.json for dependencies
updated docs to reflect package.json deps install
more documentation
metrics.isReady is undefined if metrics are not enabled
added static file server in /static via express
Merge branch 'dependencies'
proper formatting in package.json
removed main, and /static dir in this branch
server: lazy-load memcache module

Don't require that the memcache module is installed if metrics_enabled=false.
doc: server metrics require the memcache module
Update license and readme
Add sound files
Merge remote branch 'mkrecny/deps'
Merge remote branch 'bnoordhuis/metrics'

Conflicts:
	server/README.md
Fix require call and missing semicolon
Add map exporter tool
Update map exporter docs