args to it, and returns 4 values:
* the process's pid
* the process's standard-input-port (for writing)
* the process's standard-output-port (for reading)
* the process's standard-error-port (for reading)
See lab/process-example.ss for a sample usage.
- ikarus.boot now goes to $prefix/lib/ikarus/ikarus.boot
- location of bootfile is now hard-coded in the ikarus executable
- pdf/README/COPYING/GPL-3 files go to $prefix/doc/ikarus/
- Added a 1-line "scheme-script" script to bin.