Resolves: bug 363168
    Description: Add autotool support to svrcore; have svrcore build shared libs
    Fix Description: This is a pretty basic autotool-ization using libtool
    to build the shared library.  The vast majority of the work was done
    by Toshio-san.  However, there are a couple of extras worth noting:
    1) Windows builds are different now.  In order to build on Windows using
    the MSVC compiler, you still have to use coreconf.  I just could not get
    configure/libtool to work correctly with the MSVC compiler.  The old
    makefile has been moved to src/Makefile.win, so you just have to
     cd src ; make -f Makefile.win
    I also updated the README and INSTALL.win to add this information.
    2) I added some m4 files to find and figure out which nspr and nss to use
    based on the environment and pkg-config.