Win32 related fixes.

-Replacing references to outdated win32 slony sites.
 EnterpriseDB is much more current with respect to building slony
 binaries than the other sites.
-Adding section on building win32.
-Misc cleanups related to the windows build

Branch
------
master

Details
-------
http://git.postgresql.org/gitweb?p=slony1-engine.git;a=commitdiff;h=dc170188fd03a3bb09338bd1ae487d8844afb996

Modified Files
--------------
doc/adminguide/installation.sgml |   62 +++++++++++++++++++++++++++++++++----
src/backend/win32.mak            |    8 ++--
src/slon/slon.c                  |    3 +-
src/slon/slon.h                  |    1 +
src/slon/win32.mak               |   13 ++++----
src/slonik/dbutil.c              |    6 ++-
src/slonik/parser.y              |    2 +-
src/slonik/scan.l                |    1 -
src/slonik/slonik.c              |    9 ++++--
src/slonik/win32.mak             |    7 ++--
10 files changed, 84 insertions(+), 28 deletions(-)