substitute-h2k.rb: Add support for skylights, windows in doors

[fergusoa]

Add the following window elements into HTAP:

• Windows in ceilings (i.e., skylights). Determine if also need to use the "Skylight" window type.
• Windows in doors
• The only other window element allowed in H2K is windows in closed crawlspaces and it may make sense to also add this

[jblake59]

I spent some time looking into Adam’s code and testing it out on various files. It works fine on files that have windows that use the 6 digit window codes (directly or through library favourites) but does not work for user defined window codes. As such, the method will not be added to HTAP at this time.

[jblake59]

Not quite done! Need to modify Hot2000.options and Hot2000.choices to include window types that are representative of those used in Skylights and doors. Note that there is a "Skylight" window type in the window code selector that probably should be used for skylights (I have the Enermodal docs on this).

Also, need to separate upgrades to skylights and windows in doors into their own option rather than including in the Opt-CasementWindows option as it is now with the change made under this ticket. It makes no sense to change skylights and door windows to the same window type as the rest of the house.