added PAL60 specification. even though it isn't a real specification it
is more convenient and provides better user feedback
moved FrameInfo into frameinfo package, now called Current as in
frameinfo.Current
clarified storage of requested specification by the television:
how the television is probed for the specification has changed, in
particular the current spec is retreived via the GetFrameInfo()
function. in fact, this was how most other packages did it but there
also existed a GetSpecID() which was uncessary
GetReqSpecID() and GetCreationSpecID() removed, replaced with
GetResetSpecID() and IsAutoSpec()
simplified SetSpec(). removed the force argument
removed reset option for vcs.AttachCartridge()
this is instead of swapping FrameInfo information and setting the
resizer values based on that. this is used by the television in
conjuction with the preview package
