Official MPD clarification

[Travis Cobbs]

Based on the replies here, I think the following changes should be made to the LDraw file format spec:

• Update the LDraw file format version number to 1.1.0 (not 1.0.2)
  
• Add the following sub-section under the "Basic parsing / file content" sub-section of the "LDraw Files" section:
  

  Multi-Part Dat (MPD)
  Any LDraw file, no matter its file extension, may be a Multi-Part Dat file (file with other files wrapped inside). This is done using the MPD Language Extension.

• Change the "MPD Statements" sub-section of the "META Commands" section to be as follows:
  

  Support for the MPD Language Extension is required.

Also, update the File Format Restrictions for the Official Library spec. Add the following new paragraph to the "META Commands" section directly above its last paragraph (the one starting with "Legacy parts"):

To reiterate: No other meta-commands (including the MPD meta-command) are allowed in official parts.