drm/i915: i915_gem_do_init() is i915_gem_init_global_gtt()

Drop it and reduce differences with Linux 3.8.13 in the code using it.
dloader: Add a new option for color loader, "fred_is_blue"

When loader_color="YES", the dragonfly logo will show Fred as a red
dragonfly with red wings.  If fred_is_blue="YES" is set in loader.conf
as well, then a blue version of Fred will show instead (slightly more
fancy as wings are two-tone).

While here, update the man page with this new option and document
"fred_separated" option which was added yesterday.