Compile order of ASN.1 files

[sebastiw]

Make it possible to compile ASN.1s that are dependent on other ASN.1s
but would be compiled at a later stage due to the name or directory.

Example

  {compile_order, [{file, "etsi_ETR091_ed1_9307/MobileDomainDefinitions.asn1"},
                   {dir, "itu-t_X.880_9407"},
                   {dir, "itu-t_Q.773_9706"},
                   {dir, "ts29.002-v17.2.0"},
                   {wildcard, "**/*.asn1"}
                  ]}

Many of the ASN.1 files here depend on MobileDomainDefinitions, and ts29.002 depend on Q.773 which depend on X.880.
You get weird errors if they are not compiled in the right order.

[sebastiw]

Ping @knusbaum

[knusbaum]

Code and documentation looks good.

Thanks for the contribution, @sebastiw. I will try and publish this within a week.