build: support for !linux builds (#6)

Makes ARP magic optional.

Remove HTTP and TFTP write timeouts

These timeouts were disrupting downloads to slower
clients for larger proxied content.

api: fix /api/manifests/{id}

api: fix route order - it matters

api: TLS & Authentication (#4)

feature: add support for localDir (#2)

localDir allows one to serve files that are stored on the host machine

Manifest documentation