Add new pubkey for Alert Messages

The original pubkey for Alert Messages was inserted by original developer(s)
which have long since abandonded the project. No one has the private key
for that pubkey, so we cannot send any alert messages.
The new key has not been tested yet, but the exisiting one doesn't work
anyway. sxcer created the key pair and it will be distributed to several
users at sexcoinforum.org.

As a sidenote, the original pubkey is identical to the one distributed
with the last known RoyalCoin sources:

https://sourceforge.net/projects/royalcoin/files/royalcoin-source.zip/download
windows .pro file improvements and version change to 0.6.4.5

  - Add vars to more easily adapt to different drive layouts
  - Reorganize and clean up LIB and INCLUDE vars
  - Actually use Boost lib suffix var
  - Fix qrencode qrcode var names, text, and lib names
  - Add -fpermissive to C/CXXFLAGS to change error on func arg types to warning
Enable build info (build.h) on windows

On windows with command line Git (which includes msys/bash shell) from
http://git-scm.com/
installed, you can successfully execute the genbuild.sh script to create
build.h. Use USE_BUILD_INFO=1 to enable on any host/OS. No checking for
git is done, so it will fail if Git is not installed on windows.
fixup version string creation from genbuild.sh on windows for sexcoind

add genbuild.sh run to sexcoind building on windows, plus minor
makefile.mingw changes for INCLUDE and LIB paths to denote versions
used
do not use client suffix string
Merge pull request #10 from sxcer/master

v0.6.4.5