Imports of streaming-file-upload command

PathSynopsis
github.com/labstack/echoPackage echo implements high performance, minimalist Go web framework.
github.com/labstack/echo/middleware
ioPackage io provides basic interfaces to I/O primitives.
io/ioutilPackage ioutil implements some I/O utility functions.
net/httpPackage http provides HTTP client and server implementations.
osPackage os provides a platform-independent interface to operating system functionality.