[M3devel] dependency on platform list removed

[Jay]

I removed the dependency libm3 had on the list of platforms that the compiler has.
This should make the system easier to build.
You'll no longer get the error about SocketPosix and Compiler disagreeing.
 
 
I thought m3core had a dependency that would harder to remove but I'm not sure.
 
 
The SOLgnu Tinderbox had been failing due to this dependency but about the time I made the change, it started succeeding. (I thought Tinderbox ran "upgrade.sh" first, which gets around this.)
 
 
Removing the dependency should actually be a /little/ more efficient as well, not noticably.
A bunch of unused strings are removed from libm3.
Even the ones remaining are a dubious error fallback.
 
 
This could be viewed as a bad thing, since before there was a "check" that you had things up to date. Now more mixes can be used, for better or worse.
 
 
 - Jay