Added a cleaner way to install demo source so that installed versions use a
simplified makedefs/makerules.
Small fix to get osgText to compile with Solaris CC. Constructor declared
with a non-const argument, but implemented with const argument.
Added distrules and makerpms for building RPM distributions
Removed old RedHatRPM distribution build directory
Added new dist/RPM directory and placed temporary .spec files (these
are generated by Make/makerpms and are not intended for stand-alone
use, but they keep the directory warm and CVS happy)
