2 Linux Fixes

[xxxajk]

Fix 1 adds a new makefile that allows full dynamic linking on Linux. This is the only way pic32prog is able to build on my system.
Fix 2 adds the DTR|RTS toggle on serial for any non-windows OS. This fixes the problem with detecting the UNO32. I don't have windows, but the fix is similar, therefore I have not included it as a patch. However code that should work will look something like this:

EscapeCommFunction(fd, CLRDTR);
EscapeCommFunction(fd, CLRRTS);
usleep(250*1000);
EscapeCommFunction(fd, SETDTR);
EscapeCommFunction(fd, SETRTS);
usleep(50*1000);

Hope this helps.

[sergev]

Merged into a separate branch: https://github.com/sergev/pic32prog/tree/serial-dtr
Need to check it on Windows.

[xxxajk]

Glad to see that you finally have begun to see the use case. :-)