Also ignore extern(al)

...because some of us don't like 'vendor'
Remove DCPU-16 ASM language
Merge pull request #1309 from github/gameover-0x10c

Gameover 0x10c
Add tests for extern(al) being vendored
Merge pull request #1305 from neersighted/patch-1

Also ignore extern(al)
Add FORTRAN samples.
Add Forth extensions .f and .for; add heuristics for Forth and FORTRAN.
Update samples.json.