… such as

GPUs or FPGAs.

  -FunctionResources was extended with a new field called Others. This field stores
   extended resource definitions. Others is a map of strings, where the keys and
   values are pure strings.
  -A new unmarshaler was added for the FunctionResources struct. When the function
   manifest YAML is parsed this unmarshaler will validate and sanitize resource
   definitions. CPU and Memory requests are passed as they are, while other
   definitions are tested against a regexp.
  -The valid format of an extended resource for now is "vendor.domain/[gpu,fpga]",
   where vendor and domain can be any string. It's important to have a . [dot]
   between the two. After / [slash] the only valid resource names are gpu or fpga.
   This part should be documented in the appropriate place.
  -Tests also added for the new unmarshaler.

Signed-off-by: Ferenc Szekely <ferenc.szekely@intel.com>

Signed-off-by: Ferenc Szekely <ferenc.szekely@intel.com>