Updated link to msys2 files

The previous link is no longer valid. Its been corrected to point to the current location of the msys2 snapshots
Changed MSYS2 link to https
Update software versions.
boost: Update patch set
bzip2: Update patchset
freetype: Update.
bzip2: Add listed patches.
ICU: Update.
Remove extra stuff.
Update README for MSYS2 configuring.
libarchive: Update.
libjpeg-turbo: Update.
libpng: Update apng patch.
libxml2: Update patch set.
libxslt: Update
openssl: Update.
pcre: Update.
postgresql: Update.
python2: Update patch set.
Add Qt-5.3.0 build script.