CosmOS pre-alpha and launchable application versions of old programs.

Tests/expected/cosmos.out

@@ -0,0 +1,25 @@
+CosmOS
+> dir          list what is on the disk
+load <file>  read a program off the disk
+run          start what was loaded
+dump         sixty four bytes of memory, and again for more
+             dump <program|data|bank> <address>
+help         this
+exit         stop
+> greeting.txt            17
+filler1.txt             8
+filler2.txt             8
+filler3.txt             8
+filler4.txt             8
+filler5.txt             8
+filler6.txt             8
+filler7.txt             8
+filler8.txt             8
+across.txt              700
+empty.txt               0
+aName22CharactersLong!  22
+12 files
+> > I do not know: frobnicate
+> halted
+Execution halted after 12376 cycles.
+[exit 0]