Update inweb to 6L38 version
Update to 6L38 version of cBlorb
Update to patched version of Inform 6

This is not a 6.34 release, but contains two patches relative to the
version of 6.33 that was shipped with Inform 6L02.
Update to Inform 6L38

Update package version and data archive
Use new command-line options for NI 6L38

- The "-log" option did nothing and has been removed
- "-extension" was replaced by "-format"
- "-package" was replaced by "-project"
- "-rules" was replaced by "-internal" and now refers to Inform's
  'internal' directory which is $pkgdatadir in our case
- "-extensions" is now "-external" but we don't use it, instead leaving
  it to its default value