for listening for commands from network;
transfer fields; attempts to get "play" to play, etc.
Some from Stuart: PpCmd uses string object;
passing PpCmd commands by transfer-field
from master to slaves.

and socket structures from Will Davis.
Update PpCmd to freeze commands into string objects.

in Syzygy case.

looks like a real bug, yeow.

Will Davis' changes:  No . before $(OBJ_SUFFIX).  Don't override .cc.o / .cpp.o rules.

Include Syzygy's $(COMPILE_FLAGS) in our $(CFLAGS)/$(CXXFLAGS).
For MinGW, need "-liberty" (for random()) and be sure to compile winjunk.c.

Explicitly (int) when we've parsed into a float.

according to whether msg() or warn() was called.

swap32() and swap16() return void.

onWindowStartGL() returns void.

Implement PpCmd interface for serializing commands for network transport.

Updated PpCmd interface too.

Use #defines for access() and stat().

just define our own.

Need <sys/types.h> -- for MinGW?

Handle -seconds and -frames correctly -- thanks to g++ -Wall for catching
improper ref to ws->...!

It contains only internal .h references -- not to system headers nor Syzygy ones.

will be part of this.  Prepare to package multiple commands together
so we can ship several in one display cycle.

though not to process any commands after command-line startup yet.